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Currently supported: All versions

Unable to download Forge because "These Libraries failed to download. Try Again"

l1ttyluke
in Support & Bug Reports

Featured Replies

Posted

This is what  the error says: https://imgur.com/eEivA2e

I downloaded the latest version of Forge, 1.14.4.

I've tried this tutorial: https://www.youtube.com/watch?v=OaYbNe6mk1Y, and this one: https://www.minecraftforge.net/forum/topic/52285-forge-installation-issues/?tab=comments#comment-255402, but neither of them work. I have the latest version of Java and I made sure it's allowed through my firewall.

I even re-installed Minecraft.

 

Can anyone help?

 

  • Quote
    • Author
    Spoiler

    JVM info: Oracle Corporation - 1.8.0_91 - 25.91-b15
    java.net.preferIPv4Stack=true
    Extracting json
    Extracting json
    Considering minecraft client jar
    Considering minecraft client jar
    Downloading libraries
    Downloading libraries
    Considering library net.minecraftforge:forge:1.14.4-28.0.11
      Extracting library from /maven/net/minecraftforge/forge/1.14.4-28.0.11/forge-1.14.4-28.0.11.jar
        Extraction completed: Checksum validated.
    Considering library org.ow2.asm:asm:6.2
      Downloading library from https://files.minecraftforge.net/maven/org/ow2/asm/asm/6.2/asm-6.2.jar
    javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
        at sun.security.ssl.Alerts.getSSLException(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.fatal(Unknown Source)
        at sun.security.ssl.Handshaker.fatalSE(Unknown Source)
        at sun.security.ssl.Handshaker.fatalSE(Unknown Source)
        at sun.security.ssl.ClientHandshaker.serverCertificate(Unknown Source)
        at sun.security.ssl.ClientHandshaker.processMessage(Unknown Source)
        at sun.security.ssl.Handshaker.processLoop(Unknown Source)
        at sun.security.ssl.Handshaker.process_record(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.readRecord(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.performInitialHandshake(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.startHandshake(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.startHandshake(Unknown Source)
        at sun.net.www.protocol.https.HttpsClient.afterConnect(Unknown Source)
        at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(Unknown Source)
        at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(Unknown Source)
        at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source)
        at java.net.HttpURLConnection.getResponseCode(Unknown Source)
        at sun.net.www.protocol.https.HttpsURLConnectionImpl.getResponseCode(Unknown Source)
        at net.minecraftforge.installer.DownloadUtils.getConnection(DownloadUtils.java:203)
        at net.minecraftforge.installer.DownloadUtils.download(DownloadUtils.java:144)
        at net.minecraftforge.installer.DownloadUtils.download(DownloadUtils.java:134)
        at net.minecraftforge.installer.DownloadUtils.downloadLibrary(DownloadUtils.java:123)
        at net.minecraftforge.installer.actions.Action.downloadLibraries(Action.java:79)
        at net.minecraftforge.installer.actions.ClientInstall.run(ClientInstall.java:108)
        at net.minecraftforge.installer.InstallerPanel.run(InstallerPanel.java:428)
        at net.minecraftforge.installer.SimpleInstaller.launchGui(SimpleInstaller.java:166)
        at net.minecraftforge.installer.SimpleInstaller.main(SimpleInstaller.java:139)
    Caused by: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
        at sun.security.validator.PKIXValidator.doBuild(Unknown Source)
        at sun.security.validator.PKIXValidator.engineValidate(Unknown Source)
        at sun.security.validator.Validator.validate(Unknown Source)
        at sun.security.ssl.X509TrustManagerImpl.validate(Unknown Source)
        at sun.security.ssl.X509TrustManagerImpl.checkTrusted(Unknown Source)
        at sun.security.ssl.X509TrustManagerImpl.checkServerTrusted(Unknown Source)
        ... 23 more
    Caused by: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
        at sun.security.provider.certpath.SunCertPathBuilder.build(Unknown Source)
        at sun.security.provider.certpath.SunCertPathBuilder.engineBuild(Unknown Source)
        at java.security.cert.CertPathBuilder.build(Unknown Source)
        ... 29 more
    Considering library org.ow2.asm:asm-commons:6.2
      Downloading library from https://files.minecraftforge.net/maven/org/ow2/asm/asm-commons/6.2/asm-commons-6.2.jar
    javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
        at sun.security.ssl.Alerts.getSSLException(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.fatal(Unknown Source)
        at sun.security.ssl.Handshaker.fatalSE(Unknown Source)
        at sun.security.ssl.Handshaker.fatalSE(Unknown Source)
        at sun.security.ssl.ClientHandshaker.serverCertificate(Unknown Source)
        at sun.security.ssl.ClientHandshaker.processMessage(Unknown Source)
        at sun.security.ssl.Handshaker.processLoop(Unknown Source)
        at sun.security.ssl.Handshaker.process_record(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.readRecord(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.performInitialHandshake(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.startHandshake(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.startHandshake(Unknown Source)
        at sun.net.www.protocol.https.HttpsClient.afterConnect(Unknown Source)
        at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(Unknown Source)
        at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(Unknown Source)
        at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source)
        at java.net.HttpURLConnection.getResponseCode(Unknown Source)
        at sun.net.www.protocol.https.HttpsURLConnectionImpl.getResponseCode(Unknown Source)
        at net.minecraftforge.installer.DownloadUtils.getConnection(DownloadUtils.java:203)
        at net.minecraftforge.installer.DownloadUtils.download(DownloadUtils.java:144)
        at net.minecraftforge.installer.DownloadUtils.download(DownloadUtils.java:134)
        at net.minecraftforge.installer.DownloadUtils.downloadLibrary(DownloadUtils.java:123)
        at net.minecraftforge.installer.actions.Action.downloadLibraries(Action.java:79)
        at net.minecraftforge.installer.actions.ClientInstall.run(ClientInstall.java:108)
        at net.minecraftforge.installer.InstallerPanel.run(InstallerPanel.java:428)
        at net.minecraftforge.installer.SimpleInstaller.launchGui(SimpleInstaller.java:166)
        at net.minecraftforge.installer.SimpleInstaller.main(SimpleInstaller.java:139)
    Caused by: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
        at sun.security.validator.PKIXValidator.doBuild(Unknown Source)
        at sun.security.validator.PKIXValidator.engineValidate(Unknown Source)
        at sun.security.validator.Validator.validate(Unknown Source)
        at sun.security.ssl.X509TrustManagerImpl.validate(Unknown Source)
        at sun.security.ssl.X509TrustManagerImpl.checkTrusted(Unknown Source)
        at sun.security.ssl.X509TrustManagerImpl.checkServerTrusted(Unknown Source)
        ... 23 more
    Caused by: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
        at sun.security.provider.certpath.SunCertPathBuilder.build(Unknown Source)
        at sun.security.provider.certpath.SunCertPathBuilder.engineBuild(Unknown Source)
        at java.security.cert.CertPathBuilder.build(Unknown Source)
        ... 29 more
    Considering library org.ow2.asm:asm-tree:6.2
      Downloading library from https://files.minecraftforge.net/maven/org/ow2/asm/asm-tree/6.2/asm-tree-6.2.jar
    javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
        at sun.security.ssl.Alerts.getSSLException(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.fatal(Unknown Source)
        at sun.security.ssl.Handshaker.fatalSE(Unknown Source)
        at sun.security.ssl.Handshaker.fatalSE(Unknown Source)
        at sun.security.ssl.ClientHandshaker.serverCertificate(Unknown Source)
        at sun.security.ssl.ClientHandshaker.processMessage(Unknown Source)
        at sun.security.ssl.Handshaker.processLoop(Unknown Source)
        at sun.security.ssl.Handshaker.process_record(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.readRecord(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.performInitialHandshake(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.startHandshake(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.startHandshake(Unknown Source)
        at sun.net.www.protocol.https.HttpsClient.afterConnect(Unknown Source)
        at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(Unknown Source)
        at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(Unknown Source)
        at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source)
        at java.net.HttpURLConnection.getResponseCode(Unknown Source)
        at sun.net.www.protocol.https.HttpsURLConnectionImpl.getResponseCode(Unknown Source)
        at net.minecraftforge.installer.DownloadUtils.getConnection(DownloadUtils.java:203)
        at net.minecraftforge.installer.DownloadUtils.download(DownloadUtils.java:144)
        at net.minecraftforge.installer.DownloadUtils.download(DownloadUtils.java:134)
        at net.minecraftforge.installer.DownloadUtils.downloadLibrary(DownloadUtils.java:123)
        at net.minecraftforge.installer.actions.Action.downloadLibraries(Action.java:79)
        at net.minecraftforge.installer.actions.ClientInstall.run(ClientInstall.java:108)
        at net.minecraftforge.installer.InstallerPanel.run(InstallerPanel.java:428)
        at net.minecraftforge.installer.SimpleInstaller.launchGui(SimpleInstaller.java:166)
        at net.minecraftforge.installer.SimpleInstaller.main(SimpleInstaller.java:139)
    Caused by: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
        at sun.security.validator.PKIXValidator.doBuild(Unknown Source)
        at sun.security.validator.PKIXValidator.engineValidate(Unknown Source)
        at sun.security.validator.Validator.validate(Unknown Source)
        at sun.security.ssl.X509TrustManagerImpl.validate(Unknown Source)
        at sun.security.ssl.X509TrustManagerImpl.checkTrusted(Unknown Source)
        at sun.security.ssl.X509TrustManagerImpl.checkServerTrusted(Unknown Source)
        ... 23 more
    Caused by: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
        at sun.security.provider.certpath.SunCertPathBuilder.build(Unknown Source)
        at sun.security.provider.certpath.SunCertPathBuilder.engineBuild(Unknown Source)
        at java.security.cert.CertPathBuilder.build(Unknown Source)
        ... 29 more
    Considering library cpw.mods:modlauncher:3.0.2
      Downloading library from https://files.minecraftforge.net/maven/cpw/mods/modlauncher/3.0.2/modlauncher-3.0.2.jar
    javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
        at sun.security.ssl.Alerts.getSSLException(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.fatal(Unknown Source)
        at sun.security.ssl.Handshaker.fatalSE(Unknown Source)
        at sun.security.ssl.Handshaker.fatalSE(Unknown Source)
        at sun.security.ssl.ClientHandshaker.serverCertificate(Unknown Source)
        at sun.security.ssl.ClientHandshaker.processMessage(Unknown Source)
        at sun.security.ssl.Handshaker.processLoop(Unknown Source)
        at sun.security.ssl.Handshaker.process_record(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.readRecord(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.performInitialHandshake(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.startHandshake(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.startHandshake(Unknown Source)
        at sun.net.www.protocol.https.HttpsClient.afterConnect(Unknown Source)
        at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(Unknown Source)
        at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(Unknown Source)
        at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source)
        at java.net.HttpURLConnection.getResponseCode(Unknown Source)
        at sun.net.www.protocol.https.HttpsURLConnectionImpl.getResponseCode(Unknown Source)
        at net.minecraftforge.installer.DownloadUtils.getConnection(DownloadUtils.java:203)
        at net.minecraftforge.installer.DownloadUtils.download(DownloadUtils.java:144)
        at net.minecraftforge.installer.DownloadUtils.download(DownloadUtils.java:134)
        at net.minecraftforge.installer.DownloadUtils.downloadLibrary(DownloadUtils.java:123)
        at net.minecraftforge.installer.actions.Action.downloadLibraries(Action.java:79)
        at net.minecraftforge.installer.actions.ClientInstall.run(ClientInstall.java:108)
        at net.minecraftforge.installer.InstallerPanel.run(InstallerPanel.java:428)
        at net.minecraftforge.installer.SimpleInstaller.launchGui(SimpleInstaller.java:166)
        at net.minecraftforge.installer.SimpleInstaller.main(SimpleInstaller.java:139)
    Caused by: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
        at sun.security.validator.PKIXValidator.doBuild(Unknown Source)
        at sun.security.validator.PKIXValidator.engineValidate(Unknown Source)
        at sun.security.validator.Validator.validate(Unknown Source)
        at sun.security.ssl.X509TrustManagerImpl.validate(Unknown Source)
        at sun.security.ssl.X509TrustManagerImpl.checkTrusted(Unknown Source)
        at sun.security.ssl.X509TrustManagerImpl.checkServerTrusted(Unknown Source)
        ... 23 more
    Caused by: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
        at sun.security.provider.certpath.SunCertPathBuilder.build(Unknown Source)
        at sun.security.provider.certpath.SunCertPathBuilder.engineBuild(Unknown Source)
        at java.security.cert.CertPathBuilder.build(Unknown Source)
        ... 29 more
    Considering library cpw.mods:grossjava9hacks:1.1.0
      Downloading library from https://files.minecraftforge.net/maven/cpw/mods/grossjava9hacks/1.1.0/grossjava9hacks-1.1.0.jar
    javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
        at sun.security.ssl.Alerts.getSSLException(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.fatal(Unknown Source)
        at sun.security.ssl.Handshaker.fatalSE(Unknown Source)
        at sun.security.ssl.Handshaker.fatalSE(Unknown Source)
        at sun.security.ssl.ClientHandshaker.serverCertificate(Unknown Source)
        at sun.security.ssl.ClientHandshaker.processMessage(Unknown Source)
        at sun.security.ssl.Handshaker.processLoop(Unknown Source)
        at sun.security.ssl.Handshaker.process_record(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.readRecord(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.performInitialHandshake(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.startHandshake(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.startHandshake(Unknown Source)
        at sun.net.www.protocol.https.HttpsClient.afterConnect(Unknown Source)
        at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(Unknown Source)
        at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(Unknown Source)
        at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source)
        at java.net.HttpURLConnection.getResponseCode(Unknown Source)
        at sun.net.www.protocol.https.HttpsURLConnectionImpl.getResponseCode(Unknown Source)
        at net.minecraftforge.installer.DownloadUtils.getConnection(DownloadUtils.java:203)
        at net.minecraftforge.installer.DownloadUtils.download(DownloadUtils.java:144)
        at net.minecraftforge.installer.DownloadUtils.download(DownloadUtils.java:134)
        at net.minecraftforge.installer.DownloadUtils.downloadLibrary(DownloadUtils.java:123)
        at net.minecraftforge.installer.actions.Action.downloadLibraries(Action.java:79)
        at net.minecraftforge.installer.actions.ClientInstall.run(ClientInstall.java:108)
        at net.minecraftforge.installer.InstallerPanel.run(InstallerPanel.java:428)
        at net.minecraftforge.installer.SimpleInstaller.launchGui(SimpleInstaller.java:166)
        at net.minecraftforge.installer.SimpleInstaller.main(SimpleInstaller.java:139)
    Caused by: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
        at sun.security.validator.PKIXValidator.doBuild(Unknown Source)
        at sun.security.validator.PKIXValidator.engineValidate(Unknown Source)
        at sun.security.validator.Validator.validate(Unknown Source)
        at sun.security.ssl.X509TrustManagerImpl.validate(Unknown Source)
        at sun.security.ssl.X509TrustManagerImpl.checkTrusted(Unknown Source)
        at sun.security.ssl.X509TrustManagerImpl.checkServerTrusted(Unknown Source)
        ... 23 more
    Caused by: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
        at sun.security.provider.certpath.SunCertPathBuilder.build(Unknown Source)
        at sun.security.provider.certpath.SunCertPathBuilder.engineBuild(Unknown Source)
        at java.security.cert.CertPathBuilder.build(Unknown Source)
        ... 29 more
    Considering library net.minecraftforge:accesstransformers:0.16.0-shadowed
      Downloading library from https://files.minecraftforge.net/maven/net/minecraftforge/accesstransformers/0.16.0/accesstransformers-0.16.0-shadowed.jar
    javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
        at sun.security.ssl.Alerts.getSSLException(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.fatal(Unknown Source)
        at sun.security.ssl.Handshaker.fatalSE(Unknown Source)
        at sun.security.ssl.Handshaker.fatalSE(Unknown Source)
        at sun.security.ssl.ClientHandshaker.serverCertificate(Unknown Source)
        at sun.security.ssl.ClientHandshaker.processMessage(Unknown Source)
        at sun.security.ssl.Handshaker.processLoop(Unknown Source)
        at sun.security.ssl.Handshaker.process_record(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.readRecord(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.performInitialHandshake(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.startHandshake(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.startHandshake(Unknown Source)
        at sun.net.www.protocol.https.HttpsClient.afterConnect(Unknown Source)
        at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(Unknown Source)
        at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(Unknown Source)
        at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source)
        at java.net.HttpURLConnection.getResponseCode(Unknown Source)
        at sun.net.www.protocol.https.HttpsURLConnectionImpl.getResponseCode(Unknown Source)
        at net.minecraftforge.installer.DownloadUtils.getConnection(DownloadUtils.java:203)
        at net.minecraftforge.installer.DownloadUtils.download(DownloadUtils.java:144)
        at net.minecraftforge.installer.DownloadUtils.download(DownloadUtils.java:134)
        at net.minecraftforge.installer.DownloadUtils.downloadLibrary(DownloadUtils.java:123)
        at net.minecraftforge.installer.actions.Action.downloadLibraries(Action.java:79)
        at net.minecraftforge.installer.actions.ClientInstall.run(ClientInstall.java:108)
        at net.minecraftforge.installer.InstallerPanel.run(InstallerPanel.java:428)
        at net.minecraftforge.installer.SimpleInstaller.launchGui(SimpleInstaller.java:166)
        at net.minecraftforge.installer.SimpleInstaller.main(SimpleInstaller.java:139)
    Caused by: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
        at sun.security.validator.PKIXValidator.doBuild(Unknown Source)
        at sun.security.validator.PKIXValidator.engineValidate(Unknown Source)
        at sun.security.validator.Validator.validate(Unknown Source)
        at sun.security.ssl.X509TrustManagerImpl.validate(Unknown Source)
        at sun.security.ssl.X509TrustManagerImpl.checkTrusted(Unknown Source)
        at sun.security.ssl.X509TrustManagerImpl.checkServerTrusted(Unknown Source)
        ... 23 more
    Caused by: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
        at sun.security.provider.certpath.SunCertPathBuilder.build(Unknown Source)
        at sun.security.provider.certpath.SunCertPathBuilder.engineBuild(Unknown Source)
        at java.security.cert.CertPathBuilder.build(Unknown Source)
        ... 29 more
    Considering library net.minecraftforge:eventbus:0.10.3-milestone.0.1+1a5fa31-service
      Downloading library from https://files.minecraftforge.net/maven/net/minecraftforge/eventbus/0.10.3-milestone.0.1+1a5fa31/eventbus-0.10.3-milestone.0.1+1a5fa31-service.jar
    javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
        at sun.security.ssl.Alerts.getSSLException(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.fatal(Unknown Source)
        at sun.security.ssl.Handshaker.fatalSE(Unknown Source)
        at sun.security.ssl.Handshaker.fatalSE(Unknown Source)
        at sun.security.ssl.ClientHandshaker.serverCertificate(Unknown Source)
        at sun.security.ssl.ClientHandshaker.processMessage(Unknown Source)
        at sun.security.ssl.Handshaker.processLoop(Unknown Source)
        at sun.security.ssl.Handshaker.process_record(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.readRecord(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.performInitialHandshake(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.startHandshake(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.startHandshake(Unknown Source)
        at sun.net.www.protocol.https.HttpsClient.afterConnect(Unknown Source)
        at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(Unknown Source)
        at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(Unknown Source)
        at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source)
        at java.net.HttpURLConnection.getResponseCode(Unknown Source)
        at sun.net.www.protocol.https.HttpsURLConnectionImpl.getResponseCode(Unknown Source)
        at net.minecraftforge.installer.DownloadUtils.getConnection(DownloadUtils.java:203)
        at net.minecraftforge.installer.DownloadUtils.download(DownloadUtils.java:144)
        at net.minecraftforge.installer.DownloadUtils.download(DownloadUtils.java:134)
        at net.minecraftforge.installer.DownloadUtils.downloadLibrary(DownloadUtils.java:123)
        at net.minecraftforge.installer.actions.Action.downloadLibraries(Action.java:79)
        at net.minecraftforge.installer.actions.ClientInstall.run(ClientInstall.java:108)
        at net.minecraftforge.installer.InstallerPanel.run(InstallerPanel.java:428)
        at net.minecraftforge.installer.SimpleInstaller.launchGui(SimpleInstaller.java:166)
        at net.minecraftforge.installer.SimpleInstaller.main(SimpleInstaller.java:139)
    Caused by: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
        at sun.security.validator.PKIXValidator.doBuild(Unknown Source)
        at sun.security.validator.PKIXValidator.engineValidate(Unknown Source)
        at sun.security.validator.Validator.validate(Unknown Source)
        at sun.security.ssl.X509TrustManagerImpl.validate(Unknown Source)
        at sun.security.ssl.X509TrustManagerImpl.checkTrusted(Unknown Source)
        at sun.security.ssl.X509TrustManagerImpl.checkServerTrusted(Unknown Source)
        ... 23 more
    Caused by: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
        at sun.security.provider.certpath.SunCertPathBuilder.build(Unknown Source)
        at sun.security.provider.certpath.SunCertPathBuilder.engineBuild(Unknown Source)
        at java.security.cert.CertPathBuilder.build(Unknown Source)
        ... 29 more
    Considering library net.minecraftforge:forgespi:0.13.0
      Downloading library from https://files.minecraftforge.net/maven/net/minecraftforge/forgespi/0.13.0/forgespi-0.13.0.jar
    javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
        at sun.security.ssl.Alerts.getSSLException(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.fatal(Unknown Source)
        at sun.security.ssl.Handshaker.fatalSE(Unknown Source)
        at sun.security.ssl.Handshaker.fatalSE(Unknown Source)
        at sun.security.ssl.ClientHandshaker.serverCertificate(Unknown Source)
        at sun.security.ssl.ClientHandshaker.processMessage(Unknown Source)
        at sun.security.ssl.Handshaker.processLoop(Unknown Source)
        at sun.security.ssl.Handshaker.process_record(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.readRecord(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.performInitialHandshake(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.startHandshake(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.startHandshake(Unknown Source)
        at sun.net.www.protocol.https.HttpsClient.afterConnect(Unknown Source)
        at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(Unknown Source)
        at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(Unknown Source)
        at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source)
        at java.net.HttpURLConnection.getResponseCode(Unknown Source)
        at sun.net.www.protocol.https.HttpsURLConnectionImpl.getResponseCode(Unknown Source)
        at net.minecraftforge.installer.DownloadUtils.getConnection(DownloadUtils.java:203)
        at net.minecraftforge.installer.DownloadUtils.download(DownloadUtils.java:144)
        at net.minecraftforge.installer.DownloadUtils.download(DownloadUtils.java:134)
        at net.minecraftforge.installer.DownloadUtils.downloadLibrary(DownloadUtils.java:123)
        at net.minecraftforge.installer.actions.Action.downloadLibraries(Action.java:79)
        at net.minecraftforge.installer.actions.ClientInstall.run(ClientInstall.java:108)
        at net.minecraftforge.installer.InstallerPanel.run(InstallerPanel.java:428)
        at net.minecraftforge.installer.SimpleInstaller.launchGui(SimpleInstaller.java:166)
        at net.minecraftforge.installer.SimpleInstaller.main(SimpleInstaller.java:139)
    Caused by: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
        at sun.security.validator.PKIXValidator.doBuild(Unknown Source)
        at sun.security.validator.PKIXValidator.engineValidate(Unknown Source)
        at sun.security.validator.Validator.validate(Unknown Source)
        at sun.security.ssl.X509TrustManagerImpl.validate(Unknown Source)
        at sun.security.ssl.X509TrustManagerImpl.checkTrusted(Unknown Source)
        at sun.security.ssl.X509TrustManagerImpl.checkServerTrusted(Unknown Source)
        ... 23 more
    Caused by: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
        at sun.security.provider.certpath.SunCertPathBuilder.build(Unknown Source)
        at sun.security.provider.certpath.SunCertPathBuilder.engineBuild(Unknown Source)
        at java.security.cert.CertPathBuilder.build(Unknown Source)
        ... 29 more
    Considering library net.minecraftforge:coremods:0.6.3-milestone.0.4+c1d1f08
      Downloading library from https://files.minecraftforge.net/maven/net/minecraftforge/coremods/0.6.3-milestone.0.4+c1d1f08/coremods-0.6.3-milestone.0.4+c1d1f08.jar
    javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
        at sun.security.ssl.Alerts.getSSLException(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.fatal(Unknown Source)
        at sun.security.ssl.Handshaker.fatalSE(Unknown Source)
        at sun.security.ssl.Handshaker.fatalSE(Unknown Source)
        at sun.security.ssl.ClientHandshaker.serverCertificate(Unknown Source)
        at sun.security.ssl.ClientHandshaker.processMessage(Unknown Source)
        at sun.security.ssl.Handshaker.processLoop(Unknown Source)
        at sun.security.ssl.Handshaker.process_record(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.readRecord(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.performInitialHandshake(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.startHandshake(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.startHandshake(Unknown Source)
        at sun.net.www.protocol.https.HttpsClient.afterConnect(Unknown Source)
        at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(Unknown Source)
        at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(Unknown Source)
        at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source)
        at java.net.HttpURLConnection.getResponseCode(Unknown Source)
        at sun.net.www.protocol.https.HttpsURLConnectionImpl.getResponseCode(Unknown Source)
        at net.minecraftforge.installer.DownloadUtils.getConnection(DownloadUtils.java:203)
        at net.minecraftforge.installer.DownloadUtils.download(DownloadUtils.java:144)
        at net.minecraftforge.installer.DownloadUtils.download(DownloadUtils.java:134)
        at net.minecraftforge.installer.DownloadUtils.downloadLibrary(DownloadUtils.java:123)
        at net.minecraftforge.installer.actions.Action.downloadLibraries(Action.java:79)
        at net.minecraftforge.installer.actions.ClientInstall.run(ClientInstall.java:108)
        at net.minecraftforge.installer.InstallerPanel.run(InstallerPanel.java:428)
        at net.minecraftforge.installer.SimpleInstaller.launchGui(SimpleInstaller.java:166)
        at net.minecraftforge.installer.SimpleInstaller.main(SimpleInstaller.java:139)
    Caused by: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
        at sun.security.validator.PKIXValidator.doBuild(Unknown Source)
        at sun.security.validator.PKIXValidator.engineValidate(Unknown Source)
        at sun.security.validator.Validator.validate(Unknown Source)
        at sun.security.ssl.X509TrustManagerImpl.validate(Unknown Source)
        at sun.security.ssl.X509TrustManagerImpl.checkTrusted(Unknown Source)
        at sun.security.ssl.X509TrustManagerImpl.checkServerTrusted(Unknown Source)
        ... 23 more
    Caused by: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
        at sun.security.provider.certpath.SunCertPathBuilder.build(Unknown Source)
        at sun.security.provider.certpath.SunCertPathBuilder.engineBuild(Unknown Source)
        at java.security.cert.CertPathBuilder.build(Unknown Source)
        ... 29 more
    Considering library net.minecraftforge:unsafe:0.2.0
      Downloading library from https://files.minecraftforge.net/maven/net/minecraftforge/unsafe/0.2.0/unsafe-0.2.0.jar
    javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
        at sun.security.ssl.Alerts.getSSLException(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.fatal(Unknown Source)
        at sun.security.ssl.Handshaker.fatalSE(Unknown Source)
        at sun.security.ssl.Handshaker.fatalSE(Unknown Source)
        at sun.security.ssl.ClientHandshaker.serverCertificate(Unknown Source)
        at sun.security.ssl.ClientHandshaker.processMessage(Unknown Source)
        at sun.security.ssl.Handshaker.processLoop(Unknown Source)
        at sun.security.ssl.Handshaker.process_record(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.readRecord(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.performInitialHandshake(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.startHandshake(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.startHandshake(Unknown Source)
        at sun.net.www.protocol.https.HttpsClient.afterConnect(Unknown Source)
        at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(Unknown Source)
        at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(Unknown Source)
        at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source)
        at java.net.HttpURLConnection.getResponseCode(Unknown Source)
        at sun.net.www.protocol.https.HttpsURLConnectionImpl.getResponseCode(Unknown Source)
        at net.minecraftforge.installer.DownloadUtils.getConnection(DownloadUtils.java:203)
        at net.minecraftforge.installer.DownloadUtils.download(DownloadUtils.java:144)
        at net.minecraftforge.installer.DownloadUtils.download(DownloadUtils.java:134)
        at net.minecraftforge.installer.DownloadUtils.downloadLibrary(DownloadUtils.java:123)
        at net.minecraftforge.installer.actions.Action.downloadLibraries(Action.java:79)
        at net.minecraftforge.installer.actions.ClientInstall.run(ClientInstall.java:108)
        at net.minecraftforge.installer.InstallerPanel.run(InstallerPanel.java:428)
        at net.minecraftforge.installer.SimpleInstaller.launchGui(SimpleInstaller.java:166)
        at net.minecraftforge.installer.SimpleInstaller.main(SimpleInstaller.java:139)
    Caused by: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
        at sun.security.validator.PKIXValidator.doBuild(Unknown Source)
        at sun.security.validator.PKIXValidator.engineValidate(Unknown Source)
        at sun.security.validator.Validator.validate(Unknown Source)
        at sun.security.ssl.X509TrustManagerImpl.validate(Unknown Source)
        at sun.security.ssl.X509TrustManagerImpl.checkTrusted(Unknown Source)
        at sun.security.ssl.X509TrustManagerImpl.checkServerTrusted(Unknown Source)
        ... 23 more
    Caused by: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
        at sun.security.provider.certpath.SunCertPathBuilder.build(Unknown Source)
        at sun.security.provider.certpath.SunCertPathBuilder.engineBuild(Unknown Source)
        at java.security.cert.CertPathBuilder.build(Unknown Source)
        ... 29 more
    Considering library com.electronwill.night-config:core:3.6.0
      Downloading library from https://files.minecraftforge.net/maven/com/electronwill/night-config/core/3.6.0/core-3.6.0.jar
    javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
        at sun.security.ssl.Alerts.getSSLException(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.fatal(Unknown Source)
        at sun.security.ssl.Handshaker.fatalSE(Unknown Source)
        at sun.security.ssl.Handshaker.fatalSE(Unknown Source)
        at sun.security.ssl.ClientHandshaker.serverCertificate(Unknown Source)
        at sun.security.ssl.ClientHandshaker.processMessage(Unknown Source)
        at sun.security.ssl.Handshaker.processLoop(Unknown Source)
        at sun.security.ssl.Handshaker.process_record(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.readRecord(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.performInitialHandshake(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.startHandshake(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.startHandshake(Unknown Source)
        at sun.net.www.protocol.https.HttpsClient.afterConnect(Unknown Source)
        at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(Unknown Source)
        at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(Unknown Source)
        at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source)
        at java.net.HttpURLConnection.getResponseCode(Unknown Source)
        at sun.net.www.protocol.https.HttpsURLConnectionImpl.getResponseCode(Unknown Source)
        at net.minecraftforge.installer.DownloadUtils.getConnection(DownloadUtils.java:203)
        at net.minecraftforge.installer.DownloadUtils.download(DownloadUtils.java:144)
        at net.minecraftforge.installer.DownloadUtils.download(DownloadUtils.java:134)
        at net.minecraftforge.installer.DownloadUtils.downloadLibrary(DownloadUtils.java:123)
        at net.minecraftforge.installer.actions.Action.downloadLibraries(Action.java:79)
        at net.minecraftforge.installer.actions.ClientInstall.run(ClientInstall.java:108)
        at net.minecraftforge.installer.InstallerPanel.run(InstallerPanel.java:428)
        at net.minecraftforge.installer.SimpleInstaller.launchGui(SimpleInstaller.java:166)
        at net.minecraftforge.installer.SimpleInstaller.main(SimpleInstaller.java:139)
    Caused by: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
        at sun.security.validator.PKIXValidator.doBuild(Unknown Source)
        at sun.security.validator.PKIXValidator.engineValidate(Unknown Source)
        at sun.security.validator.Validator.validate(Unknown Source)
        at sun.security.ssl.X509TrustManagerImpl.validate(Unknown Source)
        at sun.security.ssl.X509TrustManagerImpl.checkTrusted(Unknown Source)
        at sun.security.ssl.X509TrustManagerImpl.checkServerTrusted(Unknown Source)
        ... 23 more
    Caused by: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
        at sun.security.provider.certpath.SunCertPathBuilder.build(Unknown Source)
        at sun.security.provider.certpath.SunCertPathBuilder.engineBuild(Unknown Source)
        at java.security.cert.CertPathBuilder.build(Unknown Source)
        ... 29 more
    Considering library com.electronwill.night-config:toml:3.6.0
      Downloading library from https://files.minecraftforge.net/maven/com/electronwill/night-config/toml/3.6.0/toml-3.6.0.jar
    javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
        at sun.security.ssl.Alerts.getSSLException(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.fatal(Unknown Source)
        at sun.security.ssl.Handshaker.fatalSE(Unknown Source)
        at sun.security.ssl.Handshaker.fatalSE(Unknown Source)
        at sun.security.ssl.ClientHandshaker.serverCertificate(Unknown Source)
        at sun.security.ssl.ClientHandshaker.processMessage(Unknown Source)
        at sun.security.ssl.Handshaker.processLoop(Unknown Source)
        at sun.security.ssl.Handshaker.process_record(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.readRecord(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.performInitialHandshake(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.startHandshake(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.startHandshake(Unknown Source)
        at sun.net.www.protocol.https.HttpsClient.afterConnect(Unknown Source)
        at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(Unknown Source)
        at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(Unknown Source)
        at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source)
        at java.net.HttpURLConnection.getResponseCode(Unknown Source)
        at sun.net.www.protocol.https.HttpsURLConnectionImpl.getResponseCode(Unknown Source)
        at net.minecraftforge.installer.DownloadUtils.getConnection(DownloadUtils.java:203)
        at net.minecraftforge.installer.DownloadUtils.download(DownloadUtils.java:144)
        at net.minecraftforge.installer.DownloadUtils.download(DownloadUtils.java:134)
        at net.minecraftforge.installer.DownloadUtils.downloadLibrary(DownloadUtils.java:123)
        at net.minecraftforge.installer.actions.Action.downloadLibraries(Action.java:79)
        at net.minecraftforge.installer.actions.ClientInstall.run(ClientInstall.java:108)
        at net.minecraftforge.installer.InstallerPanel.run(InstallerPanel.java:428)
        at net.minecraftforge.installer.SimpleInstaller.launchGui(SimpleInstaller.java:166)
        at net.minecraftforge.installer.SimpleInstaller.main(SimpleInstaller.java:139)
    Caused by: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
        at sun.security.validator.PKIXValidator.doBuild(Unknown Source)
        at sun.security.validator.PKIXValidator.engineValidate(Unknown Source)
        at sun.security.validator.Validator.validate(Unknown Source)
        at sun.security.ssl.X509TrustManagerImpl.validate(Unknown Source)
        at sun.security.ssl.X509TrustManagerImpl.checkTrusted(Unknown Source)
        at sun.security.ssl.X509TrustManagerImpl.checkServerTrusted(Unknown Source)
        ... 23 more
    Caused by: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
        at sun.security.provider.certpath.SunCertPathBuilder.build(Unknown Source)
        at sun.security.provider.certpath.SunCertPathBuilder.engineBuild(Unknown Source)
        at java.security.cert.CertPathBuilder.build(Unknown Source)
        ... 29 more
    Considering library org.jline:jline:3.9.0
      Downloading library from https://files.minecraftforge.net/maven/org/jline/jline/3.9.0/jline-3.9.0.jar
    javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
        at sun.security.ssl.Alerts.getSSLException(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.fatal(Unknown Source)
        at sun.security.ssl.Handshaker.fatalSE(Unknown Source)
        at sun.security.ssl.Handshaker.fatalSE(Unknown Source)
        at sun.security.ssl.ClientHandshaker.serverCertificate(Unknown Source)
        at sun.security.ssl.ClientHandshaker.processMessage(Unknown Source)
        at sun.security.ssl.Handshaker.processLoop(Unknown Source)
        at sun.security.ssl.Handshaker.process_record(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.readRecord(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.performInitialHandshake(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.startHandshake(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.startHandshake(Unknown Source)
        at sun.net.www.protocol.https.HttpsClient.afterConnect(Unknown Source)
        at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(Unknown Source)
        at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(Unknown Source)
        at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source)
        at java.net.HttpURLConnection.getResponseCode(Unknown Source)
        at sun.net.www.protocol.https.HttpsURLConnectionImpl.getResponseCode(Unknown Source)
        at net.minecraftforge.installer.DownloadUtils.getConnection(DownloadUtils.java:203)
        at net.minecraftforge.installer.DownloadUtils.download(DownloadUtils.java:144)
        at net.minecraftforge.installer.DownloadUtils.download(DownloadUtils.java:134)
        at net.minecraftforge.installer.DownloadUtils.downloadLibrary(DownloadUtils.java:123)
        at net.minecraftforge.installer.actions.Action.downloadLibraries(Action.java:79)
        at net.minecraftforge.installer.actions.ClientInstall.run(ClientInstall.java:108)
        at net.minecraftforge.installer.InstallerPanel.run(InstallerPanel.java:428)
        at net.minecraftforge.installer.SimpleInstaller.launchGui(SimpleInstaller.java:166)
        at net.minecraftforge.installer.SimpleInstaller.main(SimpleInstaller.java:139)
    Caused by: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
        at sun.security.validator.PKIXValidator.doBuild(Unknown Source)
        at sun.security.validator.PKIXValidator.engineValidate(Unknown Source)
        at sun.security.validator.Validator.validate(Unknown Source)
        at sun.security.ssl.X509TrustManagerImpl.validate(Unknown Source)
        at sun.security.ssl.X509TrustManagerImpl.checkTrusted(Unknown Source)
        at sun.security.ssl.X509TrustManagerImpl.checkServerTrusted(Unknown Source)
        ... 23 more
    Caused by: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
        at sun.security.provider.certpath.SunCertPathBuilder.build(Unknown Source)
        at sun.security.provider.certpath.SunCertPathBuilder.engineBuild(Unknown Source)
        at java.security.cert.CertPathBuilder.build(Unknown Source)
        ... 29 more
    Considering library org.apache.maven:maven-artifact:3.6.0
      Downloading library from https://files.minecraftforge.net/maven/org/apache/maven/maven-artifact/3.6.0/maven-artifact-3.6.0.jar
    javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
        at sun.security.ssl.Alerts.getSSLException(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.fatal(Unknown Source)
        at sun.security.ssl.Handshaker.fatalSE(Unknown Source)
        at sun.security.ssl.Handshaker.fatalSE(Unknown Source)
        at sun.security.ssl.ClientHandshaker.serverCertificate(Unknown Source)
        at sun.security.ssl.ClientHandshaker.processMessage(Unknown Source)
        at sun.security.ssl.Handshaker.processLoop(Unknown Source)
        at sun.security.ssl.Handshaker.process_record(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.readRecord(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.performInitialHandshake(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.startHandshake(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.startHandshake(Unknown Source)
        at sun.net.www.protocol.https.HttpsClient.afterConnect(Unknown Source)
        at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(Unknown Source)
        at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(Unknown Source)
        at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source)
        at java.net.HttpURLConnection.getResponseCode(Unknown Source)
        at sun.net.www.protocol.https.HttpsURLConnectionImpl.getResponseCode(Unknown Source)
        at net.minecraftforge.installer.DownloadUtils.getConnection(DownloadUtils.java:203)
        at net.minecraftforge.installer.DownloadUtils.download(DownloadUtils.java:144)
        at net.minecraftforge.installer.DownloadUtils.download(DownloadUtils.java:134)
        at net.minecraftforge.installer.DownloadUtils.downloadLibrary(DownloadUtils.java:123)
        at net.minecraftforge.installer.actions.Action.downloadLibraries(Action.java:79)
        at net.minecraftforge.installer.actions.ClientInstall.run(ClientInstall.java:108)
        at net.minecraftforge.installer.InstallerPanel.run(InstallerPanel.java:428)
        at net.minecraftforge.installer.SimpleInstaller.launchGui(SimpleInstaller.java:166)
        at net.minecraftforge.installer.SimpleInstaller.main(SimpleInstaller.java:139)
    Caused by: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
        at sun.security.validator.PKIXValidator.doBuild(Unknown Source)
        at sun.security.validator.PKIXValidator.engineValidate(Unknown Source)
        at sun.security.validator.Validator.validate(Unknown Source)
        at sun.security.ssl.X509TrustManagerImpl.validate(Unknown Source)
        at sun.security.ssl.X509TrustManagerImpl.checkTrusted(Unknown Source)
        at sun.security.ssl.X509TrustManagerImpl.checkServerTrusted(Unknown Source)
        ... 23 more
    Caused by: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
        at sun.security.provider.certpath.SunCertPathBuilder.build(Unknown Source)
        at sun.security.provider.certpath.SunCertPathBuilder.engineBuild(Unknown Source)
        at java.security.cert.CertPathBuilder.build(Unknown Source)
        ... 29 more
    Considering library net.jodah:typetools:0.6.0
      Downloading library from https://files.minecraftforge.net/maven/net/jodah/typetools/0.6.0/typetools-0.6.0.jar
    javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
        at sun.security.ssl.Alerts.getSSLException(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.fatal(Unknown Source)
        at sun.security.ssl.Handshaker.fatalSE(Unknown Source)
        at sun.security.ssl.Handshaker.fatalSE(Unknown Source)
        at sun.security.ssl.ClientHandshaker.serverCertificate(Unknown Source)
        at sun.security.ssl.ClientHandshaker.processMessage(Unknown Source)
        at sun.security.ssl.Handshaker.processLoop(Unknown Source)
        at sun.security.ssl.Handshaker.process_record(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.readRecord(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.performInitialHandshake(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.startHandshake(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.startHandshake(Unknown Source)
        at sun.net.www.protocol.https.HttpsClient.afterConnect(Unknown Source)
        at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(Unknown Source)
        at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(Unknown Source)
        at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source)
        at java.net.HttpURLConnection.getResponseCode(Unknown Source)
        at sun.net.www.protocol.https.HttpsURLConnectionImpl.getResponseCode(Unknown Source)
        at net.minecraftforge.installer.DownloadUtils.getConnection(DownloadUtils.java:203)
        at net.minecraftforge.installer.DownloadUtils.download(DownloadUtils.java:144)
        at net.minecraftforge.installer.DownloadUtils.download(DownloadUtils.java:134)
        at net.minecraftforge.installer.DownloadUtils.downloadLibrary(DownloadUtils.java:123)
        at net.minecraftforge.installer.actions.Action.downloadLibraries(Action.java:79)
        at net.minecraftforge.installer.actions.ClientInstall.run(ClientInstall.java:108)
        at net.minecraftforge.installer.InstallerPanel.run(InstallerPanel.java:428)
        at net.minecraftforge.installer.SimpleInstaller.launchGui(SimpleInstaller.java:166)
        at net.minecraftforge.installer.SimpleInstaller.main(SimpleInstaller.java:139)
    Caused by: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
        at sun.security.validator.PKIXValidator.doBuild(Unknown Source)
        at sun.security.validator.PKIXValidator.engineValidate(Unknown Source)
        at sun.security.validator.Validator.validate(Unknown Source)
        at sun.security.ssl.X509TrustManagerImpl.validate(Unknown Source)
        at sun.security.ssl.X509TrustManagerImpl.checkTrusted(Unknown Source)
        at sun.security.ssl.X509TrustManagerImpl.checkServerTrusted(Unknown Source)
        ... 23 more
    Caused by: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
        at sun.security.provider.certpath.SunCertPathBuilder.build(Unknown Source)
        at sun.security.provider.certpath.SunCertPathBuilder.engineBuild(Unknown Source)
        at java.security.cert.CertPathBuilder.build(Unknown Source)
        ... 29 more
    Considering library java3d:vecmath:1.5.2
      Downloading library from https://libraries.minecraft.net/java3d/vecmath/1.5.2/vecmath-1.5.2.jar
        Download completed: Checksum validated.
    Considering library org.apache.logging.log4j:log4j-api:2.11.2
      Downloading library from https://files.minecraftforge.net/maven/org/apache/logging/log4j/log4j-api/2.11.2/log4j-api-2.11.2.jar
    javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
        at sun.security.ssl.Alerts.getSSLException(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.fatal(Unknown Source)
        at sun.security.ssl.Handshaker.fatalSE(Unknown Source)
        at sun.security.ssl.Handshaker.fatalSE(Unknown Source)
        at sun.security.ssl.ClientHandshaker.serverCertificate(Unknown Source)
        at sun.security.ssl.ClientHandshaker.processMessage(Unknown Source)
        at sun.security.ssl.Handshaker.processLoop(Unknown Source)
        at sun.security.ssl.Handshaker.process_record(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.readRecord(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.performInitialHandshake(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.startHandshake(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.startHandshake(Unknown Source)
        at sun.net.www.protocol.https.HttpsClient.afterConnect(Unknown Source)
        at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(Unknown Source)
        at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(Unknown Source)
        at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source)
        at java.net.HttpURLConnection.getResponseCode(Unknown Source)
        at sun.net.www.protocol.https.HttpsURLConnectionImpl.getResponseCode(Unknown Source)
        at net.minecraftforge.installer.DownloadUtils.getConnection(DownloadUtils.java:203)
        at net.minecraftforge.installer.DownloadUtils.download(DownloadUtils.java:144)
        at net.minecraftforge.installer.DownloadUtils.download(DownloadUtils.java:134)
        at net.minecraftforge.installer.DownloadUtils.downloadLibrary(DownloadUtils.java:123)
        at net.minecraftforge.installer.actions.Action.downloadLibraries(Action.java:79)
        at net.minecraftforge.installer.actions.ClientInstall.run(ClientInstall.java:108)
        at net.minecraftforge.installer.InstallerPanel.run(InstallerPanel.java:428)
        at net.minecraftforge.installer.SimpleInstaller.launchGui(SimpleInstaller.java:166)
        at net.minecraftforge.installer.SimpleInstaller.main(SimpleInstaller.java:139)
    Caused by: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
        at sun.security.validator.PKIXValidator.doBuild(Unknown Source)
        at sun.security.validator.PKIXValidator.engineValidate(Unknown Source)
        at sun.security.validator.Validator.validate(Unknown Source)
        at sun.security.ssl.X509TrustManagerImpl.validate(Unknown Source)
        at sun.security.ssl.X509TrustManagerImpl.checkTrusted(Unknown Source)
        at sun.security.ssl.X509TrustManagerImpl.checkServerTrusted(Unknown Source)
        ... 23 more
    Caused by: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
        at sun.security.provider.certpath.SunCertPathBuilder.build(Unknown Source)
        at sun.security.provider.certpath.SunCertPathBuilder.engineBuild(Unknown Source)
        at java.security.cert.CertPathBuilder.build(Unknown Source)
        ... 29 more
    Considering library org.apache.logging.log4j:log4j-core:2.11.2
      Downloading library from https://files.minecraftforge.net/maven/org/apache/logging/log4j/log4j-core/2.11.2/log4j-core-2.11.2.jar
    javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
        at sun.security.ssl.Alerts.getSSLException(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.fatal(Unknown Source)
        at sun.security.ssl.Handshaker.fatalSE(Unknown Source)
        at sun.security.ssl.Handshaker.fatalSE(Unknown Source)
        at sun.security.ssl.ClientHandshaker.serverCertificate(Unknown Source)
        at sun.security.ssl.ClientHandshaker.processMessage(Unknown Source)
        at sun.security.ssl.Handshaker.processLoop(Unknown Source)
        at sun.security.ssl.Handshaker.process_record(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.readRecord(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.performInitialHandshake(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.startHandshake(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.startHandshake(Unknown Source)
        at sun.net.www.protocol.https.HttpsClient.afterConnect(Unknown Source)
        at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(Unknown Source)
        at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(Unknown Source)
        at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source)
        at java.net.HttpURLConnection.getResponseCode(Unknown Source)
        at sun.net.www.protocol.https.HttpsURLConnectionImpl.getResponseCode(Unknown Source)
        at net.minecraftforge.installer.DownloadUtils.getConnection(DownloadUtils.java:203)
        at net.minecraftforge.installer.DownloadUtils.download(DownloadUtils.java:144)
        at net.minecraftforge.installer.DownloadUtils.download(DownloadUtils.java:134)
        at net.minecraftforge.installer.DownloadUtils.downloadLibrary(DownloadUtils.java:123)
        at net.minecraftforge.installer.actions.Action.downloadLibraries(Action.java:79)
        at net.minecraftforge.installer.actions.ClientInstall.run(ClientInstall.java:108)
        at net.minecraftforge.installer.InstallerPanel.run(InstallerPanel.java:428)
        at net.minecraftforge.installer.SimpleInstaller.launchGui(SimpleInstaller.java:166)
        at net.minecraftforge.installer.SimpleInstaller.main(SimpleInstaller.java:139)
    Caused by: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
        at sun.security.validator.PKIXValidator.doBuild(Unknown Source)
        at sun.security.validator.PKIXValidator.engineValidate(Unknown Source)
        at sun.security.validator.Validator.validate(Unknown Source)
        at sun.security.ssl.X509TrustManagerImpl.validate(Unknown Source)
        at sun.security.ssl.X509TrustManagerImpl.checkTrusted(Unknown Source)
        at sun.security.ssl.X509TrustManagerImpl.checkServerTrusted(Unknown Source)
        ... 23 more
    Caused by: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
        at sun.security.provider.certpath.SunCertPathBuilder.build(Unknown Source)
        at sun.security.provider.certpath.SunCertPathBuilder.engineBuild(Unknown Source)
        at java.security.cert.CertPathBuilder.build(Unknown Source)
        ... 29 more
    Considering library net.minecrell:terminalconsoleappender:1.1.1
      Downloading library from https://files.minecraftforge.net/maven/net/minecrell/terminalconsoleappender/1.1.1/terminalconsoleappender-1.1.1.jar
    javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
        at sun.security.ssl.Alerts.getSSLException(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.fatal(Unknown Source)
        at sun.security.ssl.Handshaker.fatalSE(Unknown Source)
        at sun.security.ssl.Handshaker.fatalSE(Unknown Source)
        at sun.security.ssl.ClientHandshaker.serverCertificate(Unknown Source)
        at sun.security.ssl.ClientHandshaker.processMessage(Unknown Source)
        at sun.security.ssl.Handshaker.processLoop(Unknown Source)
        at sun.security.ssl.Handshaker.process_record(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.readRecord(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.performInitialHandshake(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.startHandshake(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.startHandshake(Unknown Source)
        at sun.net.www.protocol.https.HttpsClient.afterConnect(Unknown Source)
        at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(Unknown Source)
        at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(Unknown Source)
        at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source)
        at java.net.HttpURLConnection.getResponseCode(Unknown Source)
        at sun.net.www.protocol.https.HttpsURLConnectionImpl.getResponseCode(Unknown Source)
        at net.minecraftforge.installer.DownloadUtils.getConnection(DownloadUtils.java:203)
        at net.minecraftforge.installer.DownloadUtils.download(DownloadUtils.java:144)
        at net.minecraftforge.installer.DownloadUtils.download(DownloadUtils.java:134)
        at net.minecraftforge.installer.DownloadUtils.downloadLibrary(DownloadUtils.java:123)
        at net.minecraftforge.installer.actions.Action.downloadLibraries(Action.java:79)
        at net.minecraftforge.installer.actions.ClientInstall.run(ClientInstall.java:108)
        at net.minecraftforge.installer.InstallerPanel.run(InstallerPanel.java:428)
        at net.minecraftforge.installer.SimpleInstaller.launchGui(SimpleInstaller.java:166)
        at net.minecraftforge.installer.SimpleInstaller.main(SimpleInstaller.java:139)
    Caused by: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
        at sun.security.validator.PKIXValidator.doBuild(Unknown Source)
        at sun.security.validator.PKIXValidator.engineValidate(Unknown Source)
        at sun.security.validator.Validator.validate(Unknown Source)
        at sun.security.ssl.X509TrustManagerImpl.validate(Unknown Source)
        at sun.security.ssl.X509TrustManagerImpl.checkTrusted(Unknown Source)
        at sun.security.ssl.X509TrustManagerImpl.checkServerTrusted(Unknown Source)
        ... 23 more
    Caused by: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
        at sun.security.provider.certpath.SunCertPathBuilder.build(Unknown Source)
        at sun.security.provider.certpath.SunCertPathBuilder.engineBuild(Unknown Source)
        at java.security.cert.CertPathBuilder.build(Unknown Source)
        ... 29 more
    Considering library net.sf.jopt-simple:jopt-simple:5.0.4
      Downloading library from https://files.minecraftforge.net/maven/net/sf/jopt-simple/jopt-simple/5.0.4/jopt-simple-5.0.4.jar
    javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
        at sun.security.ssl.Alerts.getSSLException(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.fatal(Unknown Source)
        at sun.security.ssl.Handshaker.fatalSE(Unknown Source)
        at sun.security.ssl.Handshaker.fatalSE(Unknown Source)
        at sun.security.ssl.ClientHandshaker.serverCertificate(Unknown Source)
        at sun.security.ssl.ClientHandshaker.processMessage(Unknown Source)
        at sun.security.ssl.Handshaker.processLoop(Unknown Source)
        at sun.security.ssl.Handshaker.process_record(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.readRecord(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.performInitialHandshake(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.startHandshake(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.startHandshake(Unknown Source)
        at sun.net.www.protocol.https.HttpsClient.afterConnect(Unknown Source)
        at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(Unknown Source)
        at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(Unknown Source)
        at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source)
        at java.net.HttpURLConnection.getResponseCode(Unknown Source)
        at sun.net.www.protocol.https.HttpsURLConnectionImpl.getResponseCode(Unknown Source)
        at net.minecraftforge.installer.DownloadUtils.getConnection(DownloadUtils.java:203)
        at net.minecraftforge.installer.DownloadUtils.download(DownloadUtils.java:144)
        at net.minecraftforge.installer.DownloadUtils.download(DownloadUtils.java:134)
        at net.minecraftforge.installer.DownloadUtils.downloadLibrary(DownloadUtils.java:123)
        at net.minecraftforge.installer.actions.Action.downloadLibraries(Action.java:79)
        at net.minecraftforge.installer.actions.ClientInstall.run(ClientInstall.java:108)
        at net.minecraftforge.installer.InstallerPanel.run(InstallerPanel.java:428)
        at net.minecraftforge.installer.SimpleInstaller.launchGui(SimpleInstaller.java:166)
        at net.minecraftforge.installer.SimpleInstaller.main(SimpleInstaller.java:139)
    Caused by: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
        at sun.security.validator.PKIXValidator.doBuild(Unknown Source)
        at sun.security.validator.PKIXValidator.engineValidate(Unknown Source)
        at sun.security.validator.Validator.validate(Unknown Source)
        at sun.security.ssl.X509TrustManagerImpl.validate(Unknown Source)
        at sun.security.ssl.X509TrustManagerImpl.checkTrusted(Unknown Source)
        at sun.security.ssl.X509TrustManagerImpl.checkServerTrusted(Unknown Source)
        ... 23 more
    Caused by: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
        at sun.security.provider.certpath.SunCertPathBuilder.build(Unknown Source)
        at sun.security.provider.certpath.SunCertPathBuilder.engineBuild(Unknown Source)
        at java.security.cert.CertPathBuilder.build(Unknown Source)
        ... 29 more
    Considering library com.github.jponge:lzma-java:1.3
      Downloading library from https://files.minecraftforge.net/maven/com/github/jponge/lzma-java/1.3/lzma-java-1.3.jar
    javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
        at sun.security.ssl.Alerts.getSSLException(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.fatal(Unknown Source)
        at sun.security.ssl.Handshaker.fatalSE(Unknown Source)
        at sun.security.ssl.Handshaker.fatalSE(Unknown Source)
        at sun.security.ssl.ClientHandshaker.serverCertificate(Unknown Source)
        at sun.security.ssl.ClientHandshaker.processMessage(Unknown Source)
        at sun.security.ssl.Handshaker.processLoop(Unknown Source)
        at sun.security.ssl.Handshaker.process_record(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.readRecord(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.performInitialHandshake(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.startHandshake(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.startHandshake(Unknown Source)
        at sun.net.www.protocol.https.HttpsClient.afterConnect(Unknown Source)
        at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(Unknown Source)
        at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(Unknown Source)
        at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source)
        at java.net.HttpURLConnection.getResponseCode(Unknown Source)
        at sun.net.www.protocol.https.HttpsURLConnectionImpl.getResponseCode(Unknown Source)
        at net.minecraftforge.installer.DownloadUtils.getConnection(DownloadUtils.java:203)
        at net.minecraftforge.installer.DownloadUtils.download(DownloadUtils.java:144)
        at net.minecraftforge.installer.DownloadUtils.download(DownloadUtils.java:134)
        at net.minecraftforge.installer.DownloadUtils.downloadLibrary(DownloadUtils.java:123)
        at net.minecraftforge.installer.actions.Action.downloadLibraries(Action.java:79)
        at net.minecraftforge.installer.actions.ClientInstall.run(ClientInstall.java:108)
        at net.minecraftforge.installer.InstallerPanel.run(InstallerPanel.java:428)
        at net.minecraftforge.installer.SimpleInstaller.launchGui(SimpleInstaller.java:166)
        at net.minecraftforge.installer.SimpleInstaller.main(SimpleInstaller.java:139)
    Caused by: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
        at sun.security.validator.PKIXValidator.doBuild(Unknown Source)
        at sun.security.validator.PKIXValidator.engineValidate(Unknown Source)
        at sun.security.validator.Validator.validate(Unknown Source)
        at sun.security.ssl.X509TrustManagerImpl.validate(Unknown Source)
        at sun.security.ssl.X509TrustManagerImpl.checkTrusted(Unknown Source)
        at sun.security.ssl.X509TrustManagerImpl.checkServerTrusted(Unknown Source)
        ... 23 more
    Caused by: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
        at sun.security.provider.certpath.SunCertPathBuilder.build(Unknown Source)
        at sun.security.provider.certpath.SunCertPathBuilder.engineBuild(Unknown Source)
        at java.security.cert.CertPathBuilder.build(Unknown Source)
        ... 29 more
    Considering library com.google.code.findbugs:jsr305:3.0.2
      Downloading library from https://files.minecraftforge.net/maven/com/google/code/findbugs/jsr305/3.0.2/jsr305-3.0.2.jar
    javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
        at sun.security.ssl.Alerts.getSSLException(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.fatal(Unknown Source)
        at sun.security.ssl.Handshaker.fatalSE(Unknown Source)
        at sun.security.ssl.Handshaker.fatalSE(Unknown Source)
        at sun.security.ssl.ClientHandshaker.serverCertificate(Unknown Source)
        at sun.security.ssl.ClientHandshaker.processMessage(Unknown Source)
        at sun.security.ssl.Handshaker.processLoop(Unknown Source)
        at sun.security.ssl.Handshaker.process_record(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.readRecord(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.performInitialHandshake(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.startHandshake(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.startHandshake(Unknown Source)
        at sun.net.www.protocol.https.HttpsClient.afterConnect(Unknown Source)
        at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(Unknown Source)
        at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(Unknown Source)
        at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source)
        at java.net.HttpURLConnection.getResponseCode(Unknown Source)
        at sun.net.www.protocol.https.HttpsURLConnectionImpl.getResponseCode(Unknown Source)
        at net.minecraftforge.installer.DownloadUtils.getConnection(DownloadUtils.java:203)
        at net.minecraftforge.installer.DownloadUtils.download(DownloadUtils.java:144)
        at net.minecraftforge.installer.DownloadUtils.download(DownloadUtils.java:134)
        at net.minecraftforge.installer.DownloadUtils.downloadLibrary(DownloadUtils.java:123)
        at net.minecraftforge.installer.actions.Action.downloadLibraries(Action.java:79)
        at net.minecraftforge.installer.actions.ClientInstall.run(ClientInstall.java:108)
        at net.minecraftforge.installer.InstallerPanel.run(InstallerPanel.java:428)
        at net.minecraftforge.installer.SimpleInstaller.launchGui(SimpleInstaller.java:166)
        at net.minecraftforge.installer.SimpleInstaller.main(SimpleInstaller.java:139)
    Caused by: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
        at sun.security.validator.PKIXValidator.doBuild(Unknown Source)
        at sun.security.validator.PKIXValidator.engineValidate(Unknown Source)
        at sun.security.validator.Validator.validate(Unknown Source)
        at sun.security.ssl.X509TrustManagerImpl.validate(Unknown Source)
        at sun.security.ssl.X509TrustManagerImpl.checkTrusted(Unknown Source)
        at sun.security.ssl.X509TrustManagerImpl.checkServerTrusted(Unknown Source)
        ... 23 more
    Caused by: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
        at sun.security.provider.certpath.SunCertPathBuilder.build(Unknown Source)
        at sun.security.provider.certpath.SunCertPathBuilder.engineBuild(Unknown Source)
        at java.security.cert.CertPathBuilder.build(Unknown Source)
        ... 29 more
    Considering library com.google.code.gson:gson:2.8.0
      File exists: Checksum validated.
    Considering library com.google.errorprone:error_prone_annotations:2.1.3
      Downloading library from https://files.minecraftforge.net/maven/com/google/errorprone/error_prone_annotations/2.1.3/error_prone_annotations-2.1.3.jar
    javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
        at sun.security.ssl.Alerts.getSSLException(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.fatal(Unknown Source)
        at sun.security.ssl.Handshaker.fatalSE(Unknown Source)
        at sun.security.ssl.Handshaker.fatalSE(Unknown Source)
        at sun.security.ssl.ClientHandshaker.serverCertificate(Unknown Source)
        at sun.security.ssl.ClientHandshaker.processMessage(Unknown Source)
        at sun.security.ssl.Handshaker.processLoop(Unknown Source)
        at sun.security.ssl.Handshaker.process_record(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.readRecord(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.performInitialHandshake(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.startHandshake(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.startHandshake(Unknown Source)
        at sun.net.www.protocol.https.HttpsClient.afterConnect(Unknown Source)
        at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(Unknown Source)
        at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(Unknown Source)
        at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source)
        at java.net.HttpURLConnection.getResponseCode(Unknown Source)
        at sun.net.www.protocol.https.HttpsURLConnectionImpl.getResponseCode(Unknown Source)
        at net.minecraftforge.installer.DownloadUtils.getConnection(DownloadUtils.java:203)
        at net.minecraftforge.installer.DownloadUtils.download(DownloadUtils.java:144)
        at net.minecraftforge.installer.DownloadUtils.download(DownloadUtils.java:134)
        at net.minecraftforge.installer.DownloadUtils.downloadLibrary(DownloadUtils.java:123)
        at net.minecraftforge.installer.actions.Action.downloadLibraries(Action.java:79)
        at net.minecraftforge.installer.actions.ClientInstall.run(ClientInstall.java:108)
        at net.minecraftforge.installer.InstallerPanel.run(InstallerPanel.java:428)
        at net.minecraftforge.installer.SimpleInstaller.launchGui(SimpleInstaller.java:166)
        at net.minecraftforge.installer.SimpleInstaller.main(SimpleInstaller.java:139)
    Caused by: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
        at sun.security.validator.PKIXValidator.doBuild(Unknown Source)
        at sun.security.validator.PKIXValidator.engineValidate(Unknown Source)
        at sun.security.validator.Validator.validate(Unknown Source)
        at sun.security.ssl.X509TrustManagerImpl.validate(Unknown Source)
        at sun.security.ssl.X509TrustManagerImpl.checkTrusted(Unknown Source)
        at sun.security.ssl.X509TrustManagerImpl.checkServerTrusted(Unknown Source)
        ... 23 more
    Caused by: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
        at sun.security.provider.certpath.SunCertPathBuilder.build(Unknown Source)
        at sun.security.provider.certpath.SunCertPathBuilder.engineBuild(Unknown Source)
        at java.security.cert.CertPathBuilder.build(Unknown Source)
        ... 29 more
    Considering library com.google.guava:guava:20.0
      Downloading library from https://files.minecraftforge.net/maven/com/google/guava/guava/20.0/guava-20.0.jar
    javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
        at sun.security.ssl.Alerts.getSSLException(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.fatal(Unknown Source)
        at sun.security.ssl.Handshaker.fatalSE(Unknown Source)
        at sun.security.ssl.Handshaker.fatalSE(Unknown Source)
        at sun.security.ssl.ClientHandshaker.serverCertificate(Unknown Source)
        at sun.security.ssl.ClientHandshaker.processMessage(Unknown Source)
        at sun.security.ssl.Handshaker.processLoop(Unknown Source)
        at sun.security.ssl.Handshaker.process_record(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.readRecord(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.performInitialHandshake(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.startHandshake(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.startHandshake(Unknown Source)
        at sun.net.www.protocol.https.HttpsClient.afterConnect(Unknown Source)
        at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(Unknown Source)
        at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(Unknown Source)
        at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source)
        at java.net.HttpURLConnection.getResponseCode(Unknown Source)
        at sun.net.www.protocol.https.HttpsURLConnectionImpl.getResponseCode(Unknown Source)
        at net.minecraftforge.installer.DownloadUtils.getConnection(DownloadUtils.java:203)
        at net.minecraftforge.installer.DownloadUtils.download(DownloadUtils.java:144)
        at net.minecraftforge.installer.DownloadUtils.download(DownloadUtils.java:134)
        at net.minecraftforge.installer.DownloadUtils.downloadLibrary(DownloadUtils.java:123)
        at net.minecraftforge.installer.actions.Action.downloadLibraries(Action.java:79)
        at net.minecraftforge.installer.actions.ClientInstall.run(ClientInstall.java:108)
        at net.minecraftforge.installer.InstallerPanel.run(InstallerPanel.java:428)
        at net.minecraftforge.installer.SimpleInstaller.launchGui(SimpleInstaller.java:166)
        at net.minecraftforge.installer.SimpleInstaller.main(SimpleInstaller.java:139)
    Caused by: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
        at sun.security.validator.PKIXValidator.doBuild(Unknown Source)
        at sun.security.validator.PKIXValidator.engineValidate(Unknown Source)
        at sun.security.validator.Validator.validate(Unknown Source)
        at sun.security.ssl.X509TrustManagerImpl.validate(Unknown Source)
        at sun.security.ssl.X509TrustManagerImpl.checkTrusted(Unknown Source)
        at sun.security.ssl.X509TrustManagerImpl.checkServerTrusted(Unknown Source)
        ... 23 more
    Caused by: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
        at sun.security.provider.certpath.SunCertPathBuilder.build(Unknown Source)
        at sun.security.provider.certpath.SunCertPathBuilder.engineBuild(Unknown Source)
        at java.security.cert.CertPathBuilder.build(Unknown Source)
        ... 29 more
    Considering library com.google.guava:guava:25.1-jre
      Downloading library from https://files.minecraftforge.net/maven/com/google/guava/guava/25.1-jre/guava-25.1-jre.jar
    javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
        at sun.security.ssl.Alerts.getSSLException(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.fatal(Unknown Source)
        at sun.security.ssl.Handshaker.fatalSE(Unknown Source)
        at sun.security.ssl.Handshaker.fatalSE(Unknown Source)
        at sun.security.ssl.ClientHandshaker.serverCertificate(Unknown Source)
        at sun.security.ssl.ClientHandshaker.processMessage(Unknown Source)
        at sun.security.ssl.Handshaker.processLoop(Unknown Source)
        at sun.security.ssl.Handshaker.process_record(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.readRecord(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.performInitialHandshake(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.startHandshake(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.startHandshake(Unknown Source)
        at sun.net.www.protocol.https.HttpsClient.afterConnect(Unknown Source)
        at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(Unknown Source)
        at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(Unknown Source)
        at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source)
        at java.net.HttpURLConnection.getResponseCode(Unknown Source)
        at sun.net.www.protocol.https.HttpsURLConnectionImpl.getResponseCode(Unknown Source)
        at net.minecraftforge.installer.DownloadUtils.getConnection(DownloadUtils.java:203)
        at net.minecraftforge.installer.DownloadUtils.download(DownloadUtils.java:144)
        at net.minecraftforge.installer.DownloadUtils.download(DownloadUtils.java:134)
        at net.minecraftforge.installer.DownloadUtils.downloadLibrary(DownloadUtils.java:123)
        at net.minecraftforge.installer.actions.Action.downloadLibraries(Action.java:79)
        at net.minecraftforge.installer.actions.ClientInstall.run(ClientInstall.java:108)
        at net.minecraftforge.installer.InstallerPanel.run(InstallerPanel.java:428)
        at net.minecraftforge.installer.SimpleInstaller.launchGui(SimpleInstaller.java:166)
        at net.minecraftforge.installer.SimpleInstaller.main(SimpleInstaller.java:139)
    Caused by: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
        at sun.security.validator.PKIXValidator.doBuild(Unknown Source)
        at sun.security.validator.PKIXValidator.engineValidate(Unknown Source)
        at sun.security.validator.Validator.validate(Unknown Source)
        at sun.security.ssl.X509TrustManagerImpl.validate(Unknown Source)
        at sun.security.ssl.X509TrustManagerImpl.checkTrusted(Unknown Source)
        at sun.security.ssl.X509TrustManagerImpl.checkServerTrusted(Unknown Source)
        ... 23 more
    Caused by: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
        at sun.security.provider.certpath.SunCertPathBuilder.build(Unknown Source)
        at sun.security.provider.certpath.SunCertPathBuilder.engineBuild(Unknown Source)
        at java.security.cert.CertPathBuilder.build(Unknown Source)
        ... 29 more
    Considering library com.google.j2objc:j2objc-annotations:1.1
      Downloading library from https://files.minecraftforge.net/maven/com/google/j2objc/j2objc-annotations/1.1/j2objc-annotations-1.1.jar
    javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
        at sun.security.ssl.Alerts.getSSLException(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.fatal(Unknown Source)
        at sun.security.ssl.Handshaker.fatalSE(Unknown Source)
        at sun.security.ssl.Handshaker.fatalSE(Unknown Source)
        at sun.security.ssl.ClientHandshaker.serverCertificate(Unknown Source)
        at sun.security.ssl.ClientHandshaker.processMessage(Unknown Source)
        at sun.security.ssl.Handshaker.processLoop(Unknown Source)
        at sun.security.ssl.Handshaker.process_record(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.readRecord(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.performInitialHandshake(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.startHandshake(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.startHandshake(Unknown Source)
        at sun.net.www.protocol.https.HttpsClient.afterConnect(Unknown Source)
        at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(Unknown Source)
        at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(Unknown Source)
        at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source)
        at java.net.HttpURLConnection.getResponseCode(Unknown Source)
        at sun.net.www.protocol.https.HttpsURLConnectionImpl.getResponseCode(Unknown Source)
        at net.minecraftforge.installer.DownloadUtils.getConnection(DownloadUtils.java:203)
        at net.minecraftforge.installer.DownloadUtils.download(DownloadUtils.java:144)
        at net.minecraftforge.installer.DownloadUtils.download(DownloadUtils.java:134)
        at net.minecraftforge.installer.DownloadUtils.downloadLibrary(DownloadUtils.java:123)
        at net.minecraftforge.installer.actions.Action.downloadLibraries(Action.java:79)
        at net.minecraftforge.installer.actions.ClientInstall.run(ClientInstall.java:108)
        at net.minecraftforge.installer.InstallerPanel.run(InstallerPanel.java:428)
        at net.minecraftforge.installer.SimpleInstaller.launchGui(SimpleInstaller.java:166)
        at net.minecraftforge.installer.SimpleInstaller.main(SimpleInstaller.java:139)
    Caused by: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
        at sun.security.validator.PKIXValidator.doBuild(Unknown Source)
        at sun.security.validator.PKIXValidator.engineValidate(Unknown Source)
        at sun.security.validator.Validator.validate(Unknown Source)
        at sun.security.ssl.X509TrustManagerImpl.validate(Unknown Source)
        at sun.security.ssl.X509TrustManagerImpl.checkTrusted(Unknown Source)
        at sun.security.ssl.X509TrustManagerImpl.checkServerTrusted(Unknown Source)
        ... 23 more
    Caused by: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
        at sun.security.provider.certpath.SunCertPathBuilder.build(Unknown Source)
        at sun.security.provider.certpath.SunCertPathBuilder.engineBuild(Unknown Source)
        at java.security.cert.CertPathBuilder.build(Unknown Source)
        ... 29 more
    Considering library com.nothome:javaxdelta:2.0.1
      Downloading library from https://files.minecraftforge.net/maven/com/nothome/javaxdelta/2.0.1/javaxdelta-2.0.1.jar
    javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
        at sun.security.ssl.Alerts.getSSLException(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.fatal(Unknown Source)
        at sun.security.ssl.Handshaker.fatalSE(Unknown Source)
        at sun.security.ssl.Handshaker.fatalSE(Unknown Source)
        at sun.security.ssl.ClientHandshaker.serverCertificate(Unknown Source)
        at sun.security.ssl.ClientHandshaker.processMessage(Unknown Source)
        at sun.security.ssl.Handshaker.processLoop(Unknown Source)
        at sun.security.ssl.Handshaker.process_record(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.readRecord(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.performInitialHandshake(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.startHandshake(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.startHandshake(Unknown Source)
        at sun.net.www.protocol.https.HttpsClient.afterConnect(Unknown Source)
        at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(Unknown Source)
        at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(Unknown Source)
        at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source)
        at java.net.HttpURLConnection.getResponseCode(Unknown Source)
        at sun.net.www.protocol.https.HttpsURLConnectionImpl.getResponseCode(Unknown Source)
        at net.minecraftforge.installer.DownloadUtils.getConnection(DownloadUtils.java:203)
        at net.minecraftforge.installer.DownloadUtils.download(DownloadUtils.java:144)
        at net.minecraftforge.installer.DownloadUtils.download(DownloadUtils.java:134)
        at net.minecraftforge.installer.DownloadUtils.downloadLibrary(DownloadUtils.java:123)
        at net.minecraftforge.installer.actions.Action.downloadLibraries(Action.java:79)
        at net.minecraftforge.installer.actions.ClientInstall.run(ClientInstall.java:108)
        at net.minecraftforge.installer.InstallerPanel.run(InstallerPanel.java:428)
        at net.minecraftforge.installer.SimpleInstaller.launchGui(SimpleInstaller.java:166)
        at net.minecraftforge.installer.SimpleInstaller.main(SimpleInstaller.java:139)
    Caused by: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
        at sun.security.validator.PKIXValidator.doBuild(Unknown Source)
        at sun.security.validator.PKIXValidator.engineValidate(Unknown Source)
        at sun.security.validator.Validator.validate(Unknown Source)
        at sun.security.ssl.X509TrustManagerImpl.validate(Unknown Source)
        at sun.security.ssl.X509TrustManagerImpl.checkTrusted(Unknown Source)
        at sun.security.ssl.X509TrustManagerImpl.checkServerTrusted(Unknown Source)
        ... 23 more
    Caused by: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
        at sun.security.provider.certpath.SunCertPathBuilder.build(Unknown Source)
        at sun.security.provider.certpath.SunCertPathBuilder.engineBuild(Unknown Source)
        at java.security.cert.CertPathBuilder.build(Unknown Source)
        ... 29 more
    Considering library commons-io:commons-io:2.4
      Downloading library from https://libraries.minecraft.net/commons-io/commons-io/2.4/commons-io-2.4.jar
        Download completed: Checksum validated.
    Considering library de.oceanlabs.mcp:mcp_config:1.14.4-20190719.225934@zip
      Downloading library from https://files.minecraftforge.net/maven/de/oceanlabs/mcp/mcp_config/1.14.4-20190719.225934/mcp_config-1.14.4-20190719.225934.zip
    javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
        at sun.security.ssl.Alerts.getSSLException(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.fatal(Unknown Source)
        at sun.security.ssl.Handshaker.fatalSE(Unknown Source)
        at sun.security.ssl.Handshaker.fatalSE(Unknown Source)
        at sun.security.ssl.ClientHandshaker.serverCertificate(Unknown Source)
        at sun.security.ssl.ClientHandshaker.processMessage(Unknown Source)
        at sun.security.ssl.Handshaker.processLoop(Unknown Source)
        at sun.security.ssl.Handshaker.process_record(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.readRecord(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.performInitialHandshake(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.startHandshake(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.startHandshake(Unknown Source)
        at sun.net.www.protocol.https.HttpsClient.afterConnect(Unknown Source)
        at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(Unknown Source)
        at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(Unknown Source)
        at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source)
        at java.net.HttpURLConnection.getResponseCode(Unknown Source)
        at sun.net.www.protocol.https.HttpsURLConnectionImpl.getResponseCode(Unknown Source)
        at net.minecraftforge.installer.DownloadUtils.getConnection(DownloadUtils.java:203)
        at net.minecraftforge.installer.DownloadUtils.download(DownloadUtils.java:144)
        at net.minecraftforge.installer.DownloadUtils.download(DownloadUtils.java:134)
        at net.minecraftforge.installer.DownloadUtils.downloadLibrary(DownloadUtils.java:123)
        at net.minecraftforge.installer.actions.Action.downloadLibraries(Action.java:79)
        at net.minecraftforge.installer.actions.ClientInstall.run(ClientInstall.java:108)
        at net.minecraftforge.installer.InstallerPanel.run(InstallerPanel.java:428)
        at net.minecraftforge.installer.SimpleInstaller.launchGui(SimpleInstaller.java:166)
        at net.minecraftforge.installer.SimpleInstaller.main(SimpleInstaller.java:139)
    Caused by: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
        at sun.security.validator.PKIXValidator.doBuild(Unknown Source)
        at sun.security.validator.PKIXValidator.engineValidate(Unknown Source)
        at sun.security.validator.Validator.validate(Unknown Source)
        at sun.security.ssl.X509TrustManagerImpl.validate(Unknown Source)
        at sun.security.ssl.X509TrustManagerImpl.checkTrusted(Unknown Source)
        at sun.security.ssl.X509TrustManagerImpl.checkServerTrusted(Unknown Source)
        ... 23 more
    Caused by: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
        at sun.security.provider.certpath.SunCertPathBuilder.build(Unknown Source)
        at sun.security.provider.certpath.SunCertPathBuilder.engineBuild(Unknown Source)
        at java.security.cert.CertPathBuilder.build(Unknown Source)
        ... 29 more
    Considering library net.md-5:SpecialSource:1.8.5
      Downloading library from https://files.minecraftforge.net/maven/net/md-5/SpecialSource/1.8.5/SpecialSource-1.8.5.jar
    javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
        at sun.security.ssl.Alerts.getSSLException(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.fatal(Unknown Source)
        at sun.security.ssl.Handshaker.fatalSE(Unknown Source)
        at sun.security.ssl.Handshaker.fatalSE(Unknown Source)
        at sun.security.ssl.ClientHandshaker.serverCertificate(Unknown Source)
        at sun.security.ssl.ClientHandshaker.processMessage(Unknown Source)
        at sun.security.ssl.Handshaker.processLoop(Unknown Source)
        at sun.security.ssl.Handshaker.process_record(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.readRecord(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.performInitialHandshake(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.startHandshake(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.startHandshake(Unknown Source)
        at sun.net.www.protocol.https.HttpsClient.afterConnect(Unknown Source)
        at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(Unknown Source)
        at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(Unknown Source)
        at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source)
        at java.net.HttpURLConnection.getResponseCode(Unknown Source)
        at sun.net.www.protocol.https.HttpsURLConnectionImpl.getResponseCode(Unknown Source)
        at net.minecraftforge.installer.DownloadUtils.getConnection(DownloadUtils.java:203)
        at net.minecraftforge.installer.DownloadUtils.download(DownloadUtils.java:144)
        at net.minecraftforge.installer.DownloadUtils.download(DownloadUtils.java:134)
        at net.minecraftforge.installer.DownloadUtils.downloadLibrary(DownloadUtils.java:123)
        at net.minecraftforge.installer.actions.Action.downloadLibraries(Action.java:79)
        at net.minecraftforge.installer.actions.ClientInstall.run(ClientInstall.java:108)
        at net.minecraftforge.installer.InstallerPanel.run(InstallerPanel.java:428)
        at net.minecraftforge.installer.SimpleInstaller.launchGui(SimpleInstaller.java:166)
        at net.minecraftforge.installer.SimpleInstaller.main(SimpleInstaller.java:139)
    Caused by: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
        at sun.security.validator.PKIXValidator.doBuild(Unknown Source)
        at sun.security.validator.PKIXValidator.engineValidate(Unknown Source)
        at sun.security.validator.Validator.validate(Unknown Source)
        at sun.security.ssl.X509TrustManagerImpl.validate(Unknown Source)
        at sun.security.ssl.X509TrustManagerImpl.checkTrusted(Unknown Source)
        at sun.security.ssl.X509TrustManagerImpl.checkServerTrusted(Unknown Source)
        ... 23 more
    Caused by: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
        at sun.security.provider.certpath.SunCertPathBuilder.build(Unknown Source)
        at sun.security.provider.certpath.SunCertPathBuilder.engineBuild(Unknown Source)
        at java.security.cert.CertPathBuilder.build(Unknown Source)
        ... 29 more
    Considering library net.minecraftforge:binarypatcher:1.0.5
      Downloading library from https://files.minecraftforge.net/maven/net/minecraftforge/binarypatcher/1.0.5/binarypatcher-1.0.5.jar
    javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
        at sun.security.ssl.Alerts.getSSLException(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.fatal(Unknown Source)
        at sun.security.ssl.Handshaker.fatalSE(Unknown Source)
        at sun.security.ssl.Handshaker.fatalSE(Unknown Source)
        at sun.security.ssl.ClientHandshaker.serverCertificate(Unknown Source)
        at sun.security.ssl.ClientHandshaker.processMessage(Unknown Source)
        at sun.security.ssl.Handshaker.processLoop(Unknown Source)
        at sun.security.ssl.Handshaker.process_record(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.readRecord(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.performInitialHandshake(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.startHandshake(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.startHandshake(Unknown Source)
        at sun.net.www.protocol.https.HttpsClient.afterConnect(Unknown Source)
        at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(Unknown Source)
        at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(Unknown Source)
        at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source)
        at java.net.HttpURLConnection.getResponseCode(Unknown Source)
        at sun.net.www.protocol.https.HttpsURLConnectionImpl.getResponseCode(Unknown Source)
        at net.minecraftforge.installer.DownloadUtils.getConnection(DownloadUtils.java:203)
        at net.minecraftforge.installer.DownloadUtils.download(DownloadUtils.java:144)
        at net.minecraftforge.installer.DownloadUtils.download(DownloadUtils.java:134)
        at net.minecraftforge.installer.DownloadUtils.downloadLibrary(DownloadUtils.java:123)
        at net.minecraftforge.installer.actions.Action.downloadLibraries(Action.java:79)
        at net.minecraftforge.installer.actions.ClientInstall.run(ClientInstall.java:108)
        at net.minecraftforge.installer.InstallerPanel.run(InstallerPanel.java:428)
        at net.minecraftforge.installer.SimpleInstaller.launchGui(SimpleInstaller.java:166)
        at net.minecraftforge.installer.SimpleInstaller.main(SimpleInstaller.java:139)
    Caused by: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
        at sun.security.validator.PKIXValidator.doBuild(Unknown Source)
        at sun.security.validator.PKIXValidator.engineValidate(Unknown Source)
        at sun.security.validator.Validator.validate(Unknown Source)
        at sun.security.ssl.X509TrustManagerImpl.validate(Unknown Source)
        at sun.security.ssl.X509TrustManagerImpl.checkTrusted(Unknown Source)
        at sun.security.ssl.X509TrustManagerImpl.checkServerTrusted(Unknown Source)
        ... 23 more
    Caused by: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
        at sun.security.provider.certpath.SunCertPathBuilder.build(Unknown Source)
        at sun.security.provider.certpath.SunCertPathBuilder.engineBuild(Unknown Source)
        at java.security.cert.CertPathBuilder.build(Unknown Source)
        ... 29 more
    Considering library net.minecraftforge:forge:1.14.4-28.0.11:universal
      Extracting library from /maven/net/minecraftforge/forge/1.14.4-28.0.11/forge-1.14.4-28.0.11-universal.jar
        Extraction completed: Checksum validated.
    Considering library net.minecraftforge:installertools:1.1.4
      Downloading library from https://files.minecraftforge.net/maven/net/minecraftforge/installertools/1.1.4/installertools-1.1.4.jar
    javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
        at sun.security.ssl.Alerts.getSSLException(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.fatal(Unknown Source)
        at sun.security.ssl.Handshaker.fatalSE(Unknown Source)
        at sun.security.ssl.Handshaker.fatalSE(Unknown Source)
        at sun.security.ssl.ClientHandshaker.serverCertificate(Unknown Source)
        at sun.security.ssl.ClientHandshaker.processMessage(Unknown Source)
        at sun.security.ssl.Handshaker.processLoop(Unknown Source)
        at sun.security.ssl.Handshaker.process_record(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.readRecord(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.performInitialHandshake(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.startHandshake(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.startHandshake(Unknown Source)
        at sun.net.www.protocol.https.HttpsClient.afterConnect(Unknown Source)
        at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(Unknown Source)
        at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(Unknown Source)
        at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source)
        at java.net.HttpURLConnection.getResponseCode(Unknown Source)
        at sun.net.www.protocol.https.HttpsURLConnectionImpl.getResponseCode(Unknown Source)
        at net.minecraftforge.installer.DownloadUtils.getConnection(DownloadUtils.java:203)
        at net.minecraftforge.installer.DownloadUtils.download(DownloadUtils.java:144)
        at net.minecraftforge.installer.DownloadUtils.download(DownloadUtils.java:134)
        at net.minecraftforge.installer.DownloadUtils.downloadLibrary(DownloadUtils.java:123)
        at net.minecraftforge.installer.actions.Action.downloadLibraries(Action.java:79)
        at net.minecraftforge.installer.actions.ClientInstall.run(ClientInstall.java:108)
        at net.minecraftforge.installer.InstallerPanel.run(InstallerPanel.java:428)
        at net.minecraftforge.installer.SimpleInstaller.launchGui(SimpleInstaller.java:166)
        at net.minecraftforge.installer.SimpleInstaller.main(SimpleInstaller.java:139)
    Caused by: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
        at sun.security.validator.PKIXValidator.doBuild(Unknown Source)
        at sun.security.validator.PKIXValidator.engineValidate(Unknown Source)
        at sun.security.validator.Validator.validate(Unknown Source)
        at sun.security.ssl.X509TrustManagerImpl.validate(Unknown Source)
        at sun.security.ssl.X509TrustManagerImpl.checkTrusted(Unknown Source)
        at sun.security.ssl.X509TrustManagerImpl.checkServerTrusted(Unknown Source)
        ... 23 more
    Caused by: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
        at sun.security.provider.certpath.SunCertPathBuilder.build(Unknown Source)
        at sun.security.provider.certpath.SunCertPathBuilder.engineBuild(Unknown Source)
        at java.security.cert.CertPathBuilder.build(Unknown Source)
        ... 29 more
    Considering library net.minecraftforge:jarsplitter:1.1.0
      Downloading library from https://files.minecraftforge.net/maven/net/minecraftforge/jarsplitter/1.1.0/jarsplitter-1.1.0.jar
    javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
        at sun.security.ssl.Alerts.getSSLException(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.fatal(Unknown Source)
        at sun.security.ssl.Handshaker.fatalSE(Unknown Source)
        at sun.security.ssl.Handshaker.fatalSE(Unknown Source)
        at sun.security.ssl.ClientHandshaker.serverCertificate(Unknown Source)
        at sun.security.ssl.ClientHandshaker.processMessage(Unknown Source)
        at sun.security.ssl.Handshaker.processLoop(Unknown Source)
        at sun.security.ssl.Handshaker.process_record(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.readRecord(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.performInitialHandshake(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.startHandshake(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.startHandshake(Unknown Source)
        at sun.net.www.protocol.https.HttpsClient.afterConnect(Unknown Source)
        at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(Unknown Source)
        at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(Unknown Source)
        at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source)
        at java.net.HttpURLConnection.getResponseCode(Unknown Source)
        at sun.net.www.protocol.https.HttpsURLConnectionImpl.getResponseCode(Unknown Source)
        at net.minecraftforge.installer.DownloadUtils.getConnection(DownloadUtils.java:203)
        at net.minecraftforge.installer.DownloadUtils.download(DownloadUtils.java:144)
        at net.minecraftforge.installer.DownloadUtils.download(DownloadUtils.java:134)
        at net.minecraftforge.installer.DownloadUtils.downloadLibrary(DownloadUtils.java:123)
        at net.minecraftforge.installer.actions.Action.downloadLibraries(Action.java:79)
        at net.minecraftforge.installer.actions.ClientInstall.run(ClientInstall.java:108)
        at net.minecraftforge.installer.InstallerPanel.run(InstallerPanel.java:428)
        at net.minecraftforge.installer.SimpleInstaller.launchGui(SimpleInstaller.java:166)
        at net.minecraftforge.installer.SimpleInstaller.main(SimpleInstaller.java:139)
    Caused by: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
        at sun.security.validator.PKIXValidator.doBuild(Unknown Source)
        at sun.security.validator.PKIXValidator.engineValidate(Unknown Source)
        at sun.security.validator.Validator.validate(Unknown Source)
        at sun.security.ssl.X509TrustManagerImpl.validate(Unknown Source)
        at sun.security.ssl.X509TrustManagerImpl.checkTrusted(Unknown Source)
        at sun.security.ssl.X509TrustManagerImpl.checkServerTrusted(Unknown Source)
        ... 23 more
    Caused by: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
        at sun.security.provider.certpath.SunCertPathBuilder.build(Unknown Source)
        at sun.security.provider.certpath.SunCertPathBuilder.engineBuild(Unknown Source)
        at java.security.cert.CertPathBuilder.build(Unknown Source)
        ... 29 more
    Considering library net.sf.jopt-simple:jopt-simple:4.9
      Downloading library from https://files.minecraftforge.net/maven/net/sf/jopt-simple/jopt-simple/4.9/jopt-simple-4.9.jar
    javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
        at sun.security.ssl.Alerts.getSSLException(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.fatal(Unknown Source)
        at sun.security.ssl.Handshaker.fatalSE(Unknown Source)
        at sun.security.ssl.Handshaker.fatalSE(Unknown Source)
        at sun.security.ssl.ClientHandshaker.serverCertificate(Unknown Source)
        at sun.security.ssl.ClientHandshaker.processMessage(Unknown Source)
        at sun.security.ssl.Handshaker.processLoop(Unknown Source)
        at sun.security.ssl.Handshaker.process_record(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.readRecord(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.performInitialHandshake(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.startHandshake(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.startHandshake(Unknown Source)
        at sun.net.www.protocol.https.HttpsClient.afterConnect(Unknown Source)
        at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(Unknown Source)
        at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(Unknown Source)
        at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source)
        at java.net.HttpURLConnection.getResponseCode(Unknown Source)
        at sun.net.www.protocol.https.HttpsURLConnectionImpl.getResponseCode(Unknown Source)
        at net.minecraftforge.installer.DownloadUtils.getConnection(DownloadUtils.java:203)
        at net.minecraftforge.installer.DownloadUtils.download(DownloadUtils.java:144)
        at net.minecraftforge.installer.DownloadUtils.download(DownloadUtils.java:134)
        at net.minecraftforge.installer.DownloadUtils.downloadLibrary(DownloadUtils.java:123)
        at net.minecraftforge.installer.actions.Action.downloadLibraries(Action.java:79)
        at net.minecraftforge.installer.actions.ClientInstall.run(ClientInstall.java:108)
        at net.minecraftforge.installer.InstallerPanel.run(InstallerPanel.java:428)
        at net.minecraftforge.installer.SimpleInstaller.launchGui(SimpleInstaller.java:166)
        at net.minecraftforge.installer.SimpleInstaller.main(SimpleInstaller.java:139)
    Caused by: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
        at sun.security.validator.PKIXValidator.doBuild(Unknown Source)
        at sun.security.validator.PKIXValidator.engineValidate(Unknown Source)
        at sun.security.validator.Validator.validate(Unknown Source)
        at sun.security.ssl.X509TrustManagerImpl.validate(Unknown Source)
        at sun.security.ssl.X509TrustManagerImpl.checkTrusted(Unknown Source)
        at sun.security.ssl.X509TrustManagerImpl.checkServerTrusted(Unknown Source)
        ... 23 more
    Caused by: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
        at sun.security.provider.certpath.SunCertPathBuilder.build(Unknown Source)
        at sun.security.provider.certpath.SunCertPathBuilder.engineBuild(Unknown Source)
        at java.security.cert.CertPathBuilder.build(Unknown Source)
        ... 29 more
    Considering library net.sf.jopt-simple:jopt-simple:5.0.4
      Downloading library from https://files.minecraftforge.net/maven/net/sf/jopt-simple/jopt-simple/5.0.4/jopt-simple-5.0.4.jar
    javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
        at sun.security.ssl.Alerts.getSSLException(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.fatal(Unknown Source)
        at sun.security.ssl.Handshaker.fatalSE(Unknown Source)
        at sun.security.ssl.Handshaker.fatalSE(Unknown Source)
        at sun.security.ssl.ClientHandshaker.serverCertificate(Unknown Source)
        at sun.security.ssl.ClientHandshaker.processMessage(Unknown Source)
        at sun.security.ssl.Handshaker.processLoop(Unknown Source)
        at sun.security.ssl.Handshaker.process_record(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.readRecord(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.performInitialHandshake(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.startHandshake(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.startHandshake(Unknown Source)
        at sun.net.www.protocol.https.HttpsClient.afterConnect(Unknown Source)
        at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(Unknown Source)
        at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(Unknown Source)
        at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source)
        at java.net.HttpURLConnection.getResponseCode(Unknown Source)
        at sun.net.www.protocol.https.HttpsURLConnectionImpl.getResponseCode(Unknown Source)
        at net.minecraftforge.installer.DownloadUtils.getConnection(DownloadUtils.java:203)
        at net.minecraftforge.installer.DownloadUtils.download(DownloadUtils.java:144)
        at net.minecraftforge.installer.DownloadUtils.download(DownloadUtils.java:134)
        at net.minecraftforge.installer.DownloadUtils.downloadLibrary(DownloadUtils.java:123)
        at net.minecraftforge.installer.actions.Action.downloadLibraries(Action.java:79)
        at net.minecraftforge.installer.actions.ClientInstall.run(ClientInstall.java:108)
        at net.minecraftforge.installer.InstallerPanel.run(InstallerPanel.java:428)
        at net.minecraftforge.installer.SimpleInstaller.launchGui(SimpleInstaller.java:166)
        at net.minecraftforge.installer.SimpleInstaller.main(SimpleInstaller.java:139)
    Caused by: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
        at sun.security.validator.PKIXValidator.doBuild(Unknown Source)
        at sun.security.validator.PKIXValidator.engineValidate(Unknown Source)
        at sun.security.validator.Validator.validate(Unknown Source)
        at sun.security.ssl.X509TrustManagerImpl.validate(Unknown Source)
        at sun.security.ssl.X509TrustManagerImpl.checkTrusted(Unknown Source)
        at sun.security.ssl.X509TrustManagerImpl.checkServerTrusted(Unknown Source)
        ... 23 more
    Caused by: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
        at sun.security.provider.certpath.SunCertPathBuilder.build(Unknown Source)
        at sun.security.provider.certpath.SunCertPathBuilder.engineBuild(Unknown Source)
        at java.security.cert.CertPathBuilder.build(Unknown Source)
        ... 29 more
    Considering library net.sf.opencsv:opencsv:2.3
      Downloading library from https://files.minecraftforge.net/maven/net/sf/opencsv/opencsv/2.3/opencsv-2.3.jar
    javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
        at sun.security.ssl.Alerts.getSSLException(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.fatal(Unknown Source)
        at sun.security.ssl.Handshaker.fatalSE(Unknown Source)
        at sun.security.ssl.Handshaker.fatalSE(Unknown Source)
        at sun.security.ssl.ClientHandshaker.serverCertificate(Unknown Source)
        at sun.security.ssl.ClientHandshaker.processMessage(Unknown Source)
        at sun.security.ssl.Handshaker.processLoop(Unknown Source)
        at sun.security.ssl.Handshaker.process_record(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.readRecord(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.performInitialHandshake(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.startHandshake(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.startHandshake(Unknown Source)
        at sun.net.www.protocol.https.HttpsClient.afterConnect(Unknown Source)
        at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(Unknown Source)
        at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(Unknown Source)
        at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source)
        at java.net.HttpURLConnection.getResponseCode(Unknown Source)
        at sun.net.www.protocol.https.HttpsURLConnectionImpl.getResponseCode(Unknown Source)
        at net.minecraftforge.installer.DownloadUtils.getConnection(DownloadUtils.java:203)
        at net.minecraftforge.installer.DownloadUtils.download(DownloadUtils.java:144)
        at net.minecraftforge.installer.DownloadUtils.download(DownloadUtils.java:134)
        at net.minecraftforge.installer.DownloadUtils.downloadLibrary(DownloadUtils.java:123)
        at net.minecraftforge.installer.actions.Action.downloadLibraries(Action.java:79)
        at net.minecraftforge.installer.actions.ClientInstall.run(ClientInstall.java:108)
        at net.minecraftforge.installer.InstallerPanel.run(InstallerPanel.java:428)
        at net.minecraftforge.installer.SimpleInstaller.launchGui(SimpleInstaller.java:166)
        at net.minecraftforge.installer.SimpleInstaller.main(SimpleInstaller.java:139)
    Caused by: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
        at sun.security.validator.PKIXValidator.doBuild(Unknown Source)
        at sun.security.validator.PKIXValidator.engineValidate(Unknown Source)
        at sun.security.validator.Validator.validate(Unknown Source)
        at sun.security.ssl.X509TrustManagerImpl.validate(Unknown Source)
        at sun.security.ssl.X509TrustManagerImpl.checkTrusted(Unknown Source)
        at sun.security.ssl.X509TrustManagerImpl.checkServerTrusted(Unknown Source)
        ... 23 more
    Caused by: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
        at sun.security.provider.certpath.SunCertPathBuilder.build(Unknown Source)
        at sun.security.provider.certpath.SunCertPathBuilder.engineBuild(Unknown Source)
        at java.security.cert.CertPathBuilder.build(Unknown Source)
        ... 29 more
    Considering library org.checkerframework:checker-qual:2.0.0
      Downloading library from https://files.minecraftforge.net/maven/org/checkerframework/checker-qual/2.0.0/checker-qual-2.0.0.jar
    javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
        at sun.security.ssl.Alerts.getSSLException(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.fatal(Unknown Source)
        at sun.security.ssl.Handshaker.fatalSE(Unknown Source)
        at sun.security.ssl.Handshaker.fatalSE(Unknown Source)
        at sun.security.ssl.ClientHandshaker.serverCertificate(Unknown Source)
        at sun.security.ssl.ClientHandshaker.processMessage(Unknown Source)
        at sun.security.ssl.Handshaker.processLoop(Unknown Source)
        at sun.security.ssl.Handshaker.process_record(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.readRecord(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.performInitialHandshake(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.startHandshake(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.startHandshake(Unknown Source)
        at sun.net.www.protocol.https.HttpsClient.afterConnect(Unknown Source)
        at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(Unknown Source)
        at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(Unknown Source)
        at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source)
        at java.net.HttpURLConnection.getResponseCode(Unknown Source)
        at sun.net.www.protocol.https.HttpsURLConnectionImpl.getResponseCode(Unknown Source)
        at net.minecraftforge.installer.DownloadUtils.getConnection(DownloadUtils.java:203)
        at net.minecraftforge.installer.DownloadUtils.download(DownloadUtils.java:144)
        at net.minecraftforge.installer.DownloadUtils.download(DownloadUtils.java:134)
        at net.minecraftforge.installer.DownloadUtils.downloadLibrary(DownloadUtils.java:123)
        at net.minecraftforge.installer.actions.Action.downloadLibraries(Action.java:79)
        at net.minecraftforge.installer.actions.ClientInstall.run(ClientInstall.java:108)
        at net.minecraftforge.installer.InstallerPanel.run(InstallerPanel.java:428)
        at net.minecraftforge.installer.SimpleInstaller.launchGui(SimpleInstaller.java:166)
        at net.minecraftforge.installer.SimpleInstaller.main(SimpleInstaller.java:139)
    Caused by: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
        at sun.security.validator.PKIXValidator.doBuild(Unknown Source)
        at sun.security.validator.PKIXValidator.engineValidate(Unknown Source)
        at sun.security.validator.Validator.validate(Unknown Source)
        at sun.security.ssl.X509TrustManagerImpl.validate(Unknown Source)
        at sun.security.ssl.X509TrustManagerImpl.checkTrusted(Unknown Source)
        at sun.security.ssl.X509TrustManagerImpl.checkServerTrusted(Unknown Source)
        ... 23 more
    Caused by: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
        at sun.security.provider.certpath.SunCertPathBuilder.build(Unknown Source)
        at sun.security.provider.certpath.SunCertPathBuilder.engineBuild(Unknown Source)
        at java.security.cert.CertPathBuilder.build(Unknown Source)
        ... 29 more
    Considering library org.codehaus.mojo:animal-sniffer-annotations:1.14
      Downloading library from https://files.minecraftforge.net/maven/org/codehaus/mojo/animal-sniffer-annotations/1.14/animal-sniffer-annotations-1.14.jar
    javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
        at sun.security.ssl.Alerts.getSSLException(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.fatal(Unknown Source)
        at sun.security.ssl.Handshaker.fatalSE(Unknown Source)
        at sun.security.ssl.Handshaker.fatalSE(Unknown Source)
        at sun.security.ssl.ClientHandshaker.serverCertificate(Unknown Source)
        at sun.security.ssl.ClientHandshaker.processMessage(Unknown Source)
        at sun.security.ssl.Handshaker.processLoop(Unknown Source)
        at sun.security.ssl.Handshaker.process_record(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.readRecord(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.performInitialHandshake(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.startHandshake(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.startHandshake(Unknown Source)
        at sun.net.www.protocol.https.HttpsClient.afterConnect(Unknown Source)
        at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(Unknown Source)
        at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(Unknown Source)
        at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source)
        at java.net.HttpURLConnection.getResponseCode(Unknown Source)
        at sun.net.www.protocol.https.HttpsURLConnectionImpl.getResponseCode(Unknown Source)
        at net.minecraftforge.installer.DownloadUtils.getConnection(DownloadUtils.java:203)
        at net.minecraftforge.installer.DownloadUtils.download(DownloadUtils.java:144)
        at net.minecraftforge.installer.DownloadUtils.download(DownloadUtils.java:134)
        at net.minecraftforge.installer.DownloadUtils.downloadLibrary(DownloadUtils.java:123)
        at net.minecraftforge.installer.actions.Action.downloadLibraries(Action.java:79)
        at net.minecraftforge.installer.actions.ClientInstall.run(ClientInstall.java:108)
        at net.minecraftforge.installer.InstallerPanel.run(InstallerPanel.java:428)
        at net.minecraftforge.installer.SimpleInstaller.launchGui(SimpleInstaller.java:166)
        at net.minecraftforge.installer.SimpleInstaller.main(SimpleInstaller.java:139)
    Caused by: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
        at sun.security.validator.PKIXValidator.doBuild(Unknown Source)
        at sun.security.validator.PKIXValidator.engineValidate(Unknown Source)
        at sun.security.validator.Validator.validate(Unknown Source)
        at sun.security.ssl.X509TrustManagerImpl.validate(Unknown Source)
        at sun.security.ssl.X509TrustManagerImpl.checkTrusted(Unknown Source)
        at sun.security.ssl.X509TrustManagerImpl.checkServerTrusted(Unknown Source)
        ... 23 more
    Caused by: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
        at sun.security.provider.certpath.SunCertPathBuilder.build(Unknown Source)
        at sun.security.provider.certpath.SunCertPathBuilder.engineBuild(Unknown Source)
        at java.security.cert.CertPathBuilder.build(Unknown Source)
        ... 29 more
    Considering library org.ow2.asm:asm-analysis:6.1.1
      Downloading library from https://files.minecraftforge.net/maven/org/ow2/asm/asm-analysis/6.1.1/asm-analysis-6.1.1.jar
    javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
        at sun.security.ssl.Alerts.getSSLException(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.fatal(Unknown Source)
        at sun.security.ssl.Handshaker.fatalSE(Unknown Source)
        at sun.security.ssl.Handshaker.fatalSE(Unknown Source)
        at sun.security.ssl.ClientHandshaker.serverCertificate(Unknown Source)
        at sun.security.ssl.ClientHandshaker.processMessage(Unknown Source)
        at sun.security.ssl.Handshaker.processLoop(Unknown Source)
        at sun.security.ssl.Handshaker.process_record(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.readRecord(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.performInitialHandshake(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.startHandshake(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.startHandshake(Unknown Source)
        at sun.net.www.protocol.https.HttpsClient.afterConnect(Unknown Source)
        at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(Unknown Source)
        at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(Unknown Source)
        at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source)
        at java.net.HttpURLConnection.getResponseCode(Unknown Source)
        at sun.net.www.protocol.https.HttpsURLConnectionImpl.getResponseCode(Unknown Source)
        at net.minecraftforge.installer.DownloadUtils.getConnection(DownloadUtils.java:203)
        at net.minecraftforge.installer.DownloadUtils.download(DownloadUtils.java:144)
        at net.minecraftforge.installer.DownloadUtils.download(DownloadUtils.java:134)
        at net.minecraftforge.installer.DownloadUtils.downloadLibrary(DownloadUtils.java:123)
        at net.minecraftforge.installer.actions.Action.downloadLibraries(Action.java:79)
        at net.minecraftforge.installer.actions.ClientInstall.run(ClientInstall.java:108)
        at net.minecraftforge.installer.InstallerPanel.run(InstallerPanel.java:428)
        at net.minecraftforge.installer.SimpleInstaller.launchGui(SimpleInstaller.java:166)
        at net.minecraftforge.installer.SimpleInstaller.main(SimpleInstaller.java:139)
    Caused by: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
        at sun.security.validator.PKIXValidator.doBuild(Unknown Source)
        at sun.security.validator.PKIXValidator.engineValidate(Unknown Source)
        at sun.security.validator.Validator.validate(Unknown Source)
        at sun.security.ssl.X509TrustManagerImpl.validate(Unknown Source)
        at sun.security.ssl.X509TrustManagerImpl.checkTrusted(Unknown Source)
        at sun.security.ssl.X509TrustManagerImpl.checkServerTrusted(Unknown Source)
        ... 23 more
    Caused by: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
        at sun.security.provider.certpath.SunCertPathBuilder.build(Unknown Source)
        at sun.security.provider.certpath.SunCertPathBuilder.engineBuild(Unknown Source)
        at java.security.cert.CertPathBuilder.build(Unknown Source)
        ... 29 more
    Considering library org.ow2.asm:asm-commons:6.1.1
      Downloading library from https://files.minecraftforge.net/maven/org/ow2/asm/asm-commons/6.1.1/asm-commons-6.1.1.jar
    javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
        at sun.security.ssl.Alerts.getSSLException(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.fatal(Unknown Source)
        at sun.security.ssl.Handshaker.fatalSE(Unknown Source)
        at sun.security.ssl.Handshaker.fatalSE(Unknown Source)
        at sun.security.ssl.ClientHandshaker.serverCertificate(Unknown Source)
        at sun.security.ssl.ClientHandshaker.processMessage(Unknown Source)
        at sun.security.ssl.Handshaker.processLoop(Unknown Source)
        at sun.security.ssl.Handshaker.process_record(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.readRecord(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.performInitialHandshake(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.startHandshake(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.startHandshake(Unknown Source)
        at sun.net.www.protocol.https.HttpsClient.afterConnect(Unknown Source)
        at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(Unknown Source)
        at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(Unknown Source)
        at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source)
        at java.net.HttpURLConnection.getResponseCode(Unknown Source)
        at sun.net.www.protocol.https.HttpsURLConnectionImpl.getResponseCode(Unknown Source)
        at net.minecraftforge.installer.DownloadUtils.getConnection(DownloadUtils.java:203)
        at net.minecraftforge.installer.DownloadUtils.download(DownloadUtils.java:144)
        at net.minecraftforge.installer.DownloadUtils.download(DownloadUtils.java:134)
        at net.minecraftforge.installer.DownloadUtils.downloadLibrary(DownloadUtils.java:123)
        at net.minecraftforge.installer.actions.Action.downloadLibraries(Action.java:79)
        at net.minecraftforge.installer.actions.ClientInstall.run(ClientInstall.java:108)
        at net.minecraftforge.installer.InstallerPanel.run(InstallerPanel.java:428)
        at net.minecraftforge.installer.SimpleInstaller.launchGui(SimpleInstaller.java:166)
        at net.minecraftforge.installer.SimpleInstaller.main(SimpleInstaller.java:139)
    Caused by: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
        at sun.security.validator.PKIXValidator.doBuild(Unknown Source)
        at sun.security.validator.PKIXValidator.engineValidate(Unknown Source)
        at sun.security.validator.Validator.validate(Unknown Source)
        at sun.security.ssl.X509TrustManagerImpl.validate(Unknown Source)
        at sun.security.ssl.X509TrustManagerImpl.checkTrusted(Unknown Source)
        at sun.security.ssl.X509TrustManagerImpl.checkServerTrusted(Unknown Source)
        ... 23 more
    Caused by: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
        at sun.security.provider.certpath.SunCertPathBuilder.build(Unknown Source)
        at sun.security.provider.certpath.SunCertPathBuilder.engineBuild(Unknown Source)
        at java.security.cert.CertPathBuilder.build(Unknown Source)
        ... 29 more
    Considering library org.ow2.asm:asm-tree:6.1.1
      Downloading library from https://files.minecraftforge.net/maven/org/ow2/asm/asm-tree/6.1.1/asm-tree-6.1.1.jar
    javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
        at sun.security.ssl.Alerts.getSSLException(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.fatal(Unknown Source)
        at sun.security.ssl.Handshaker.fatalSE(Unknown Source)
        at sun.security.ssl.Handshaker.fatalSE(Unknown Source)
        at sun.security.ssl.ClientHandshaker.serverCertificate(Unknown Source)
        at sun.security.ssl.ClientHandshaker.processMessage(Unknown Source)
        at sun.security.ssl.Handshaker.processLoop(Unknown Source)
        at sun.security.ssl.Handshaker.process_record(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.readRecord(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.performInitialHandshake(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.startHandshake(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.startHandshake(Unknown Source)
        at sun.net.www.protocol.https.HttpsClient.afterConnect(Unknown Source)
        at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(Unknown Source)
        at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(Unknown Source)
        at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source)
        at java.net.HttpURLConnection.getResponseCode(Unknown Source)
        at sun.net.www.protocol.https.HttpsURLConnectionImpl.getResponseCode(Unknown Source)
        at net.minecraftforge.installer.DownloadUtils.getConnection(DownloadUtils.java:203)
        at net.minecraftforge.installer.DownloadUtils.download(DownloadUtils.java:144)
        at net.minecraftforge.installer.DownloadUtils.download(DownloadUtils.java:134)
        at net.minecraftforge.installer.DownloadUtils.downloadLibrary(DownloadUtils.java:123)
        at net.minecraftforge.installer.actions.Action.downloadLibraries(Action.java:79)
        at net.minecraftforge.installer.actions.ClientInstall.run(ClientInstall.java:108)
        at net.minecraftforge.installer.InstallerPanel.run(InstallerPanel.java:428)
        at net.minecraftforge.installer.SimpleInstaller.launchGui(SimpleInstaller.java:166)
        at net.minecraftforge.installer.SimpleInstaller.main(SimpleInstaller.java:139)
    Caused by: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
        at sun.security.validator.PKIXValidator.doBuild(Unknown Source)
        at sun.security.validator.PKIXValidator.engineValidate(Unknown Source)
        at sun.security.validator.Validator.validate(Unknown Source)
        at sun.security.ssl.X509TrustManagerImpl.validate(Unknown Source)
        at sun.security.ssl.X509TrustManagerImpl.checkTrusted(Unknown Source)
        at sun.security.ssl.X509TrustManagerImpl.checkServerTrusted(Unknown Source)
        ... 23 more
    Caused by: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
        at sun.security.provider.certpath.SunCertPathBuilder.build(Unknown Source)
        at sun.security.provider.certpath.SunCertPathBuilder.engineBuild(Unknown Source)
        at java.security.cert.CertPathBuilder.build(Unknown Source)
        ... 29 more
    Considering library org.ow2.asm:asm:6.1.1
      Downloading library from https://files.minecraftforge.net/maven/org/ow2/asm/asm/6.1.1/asm-6.1.1.jar
    javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
        at sun.security.ssl.Alerts.getSSLException(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.fatal(Unknown Source)
        at sun.security.ssl.Handshaker.fatalSE(Unknown Source)
        at sun.security.ssl.Handshaker.fatalSE(Unknown Source)
        at sun.security.ssl.ClientHandshaker.serverCertificate(Unknown Source)
        at sun.security.ssl.ClientHandshaker.processMessage(Unknown Source)
        at sun.security.ssl.Handshaker.processLoop(Unknown Source)
        at sun.security.ssl.Handshaker.process_record(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.readRecord(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.performInitialHandshake(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.startHandshake(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.startHandshake(Unknown Source)
        at sun.net.www.protocol.https.HttpsClient.afterConnect(Unknown Source)
        at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(Unknown Source)
        at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(Unknown Source)
        at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source)
        at java.net.HttpURLConnection.getResponseCode(Unknown Source)
        at sun.net.www.protocol.https.HttpsURLConnectionImpl.getResponseCode(Unknown Source)
        at net.minecraftforge.installer.DownloadUtils.getConnection(DownloadUtils.java:203)
        at net.minecraftforge.installer.DownloadUtils.download(DownloadUtils.java:144)
        at net.minecraftforge.installer.DownloadUtils.download(DownloadUtils.java:134)
        at net.minecraftforge.installer.DownloadUtils.downloadLibrary(DownloadUtils.java:123)
        at net.minecraftforge.installer.actions.Action.downloadLibraries(Action.java:79)
        at net.minecraftforge.installer.actions.ClientInstall.run(ClientInstall.java:108)
        at net.minecraftforge.installer.InstallerPanel.run(InstallerPanel.java:428)
        at net.minecraftforge.installer.SimpleInstaller.launchGui(SimpleInstaller.java:166)
        at net.minecraftforge.installer.SimpleInstaller.main(SimpleInstaller.java:139)
    Caused by: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
        at sun.security.validator.PKIXValidator.doBuild(Unknown Source)
        at sun.security.validator.PKIXValidator.engineValidate(Unknown Source)
        at sun.security.validator.Validator.validate(Unknown Source)
        at sun.security.ssl.X509TrustManagerImpl.validate(Unknown Source)
        at sun.security.ssl.X509TrustManagerImpl.checkTrusted(Unknown Source)
        at sun.security.ssl.X509TrustManagerImpl.checkServerTrusted(Unknown Source)
        ... 23 more
    Caused by: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
        at sun.security.provider.certpath.SunCertPathBuilder.build(Unknown Source)
        at sun.security.provider.certpath.SunCertPathBuilder.engineBuild(Unknown Source)
        at java.security.cert.CertPathBuilder.build(Unknown Source)
        ... 29 more
    Considering library trove:trove:1.0.2
      Downloading library from https://files.minecraftforge.net/maven/trove/trove/1.0.2/trove-1.0.2.jar
    javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
        at sun.security.ssl.Alerts.getSSLException(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.fatal(Unknown Source)
        at sun.security.ssl.Handshaker.fatalSE(Unknown Source)
        at sun.security.ssl.Handshaker.fatalSE(Unknown Source)
        at sun.security.ssl.ClientHandshaker.serverCertificate(Unknown Source)
        at sun.security.ssl.ClientHandshaker.processMessage(Unknown Source)
        at sun.security.ssl.Handshaker.processLoop(Unknown Source)
        at sun.security.ssl.Handshaker.process_record(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.readRecord(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.performInitialHandshake(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.startHandshake(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.startHandshake(Unknown Source)
        at sun.net.www.protocol.https.HttpsClient.afterConnect(Unknown Source)
        at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(Unknown Source)
        at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(Unknown Source)
        at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source)
        at java.net.HttpURLConnection.getResponseCode(Unknown Source)
        at sun.net.www.protocol.https.HttpsURLConnectionImpl.getResponseCode(Unknown Source)
        at net.minecraftforge.installer.DownloadUtils.getConnection(DownloadUtils.java:203)
        at net.minecraftforge.installer.DownloadUtils.download(DownloadUtils.java:144)
        at net.minecraftforge.installer.DownloadUtils.download(DownloadUtils.java:134)
        at net.minecraftforge.installer.DownloadUtils.downloadLibrary(DownloadUtils.java:123)
        at net.minecraftforge.installer.actions.Action.downloadLibraries(Action.java:79)
        at net.minecraftforge.installer.actions.ClientInstall.run(ClientInstall.java:108)
        at net.minecraftforge.installer.InstallerPanel.run(InstallerPanel.java:428)
        at net.minecraftforge.installer.SimpleInstaller.launchGui(SimpleInstaller.java:166)
        at net.minecraftforge.installer.SimpleInstaller.main(SimpleInstaller.java:139)
    Caused by: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
        at sun.security.validator.PKIXValidator.doBuild(Unknown Source)
        at sun.security.validator.PKIXValidator.engineValidate(Unknown Source)
        at sun.security.validator.Validator.validate(Unknown Source)
        at sun.security.ssl.X509TrustManagerImpl.validate(Unknown Source)
        at sun.security.ssl.X509TrustManagerImpl.checkTrusted(Unknown Source)
        at sun.security.ssl.X509TrustManagerImpl.checkServerTrusted(Unknown Source)
        ... 23 more
    Caused by: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
        at sun.security.provider.certpath.SunCertPathBuilder.build(Unknown Source)
        at sun.security.provider.certpath.SunCertPathBuilder.engineBuild(Unknown Source)
        at java.security.cert.CertPathBuilder.build(Unknown Source)
        ... 29 more
    These libraries failed to download. Try again.

    org.ow2.asm:asm:6.2
    org.ow2.asm:asm-commons:6.2
    org.ow2.asm:asm-tree:6.2
    cpw.mods:modlauncher:3.0.2
    cpw.mods:grossjava9hacks:1.1.0
    net.minecraftforge:accesstransformers:0.16.0-shadowed
    net.minecraftforge:eventbus:0.10.3-milestone.0.1+1a5fa31-service
    net.minecraftforge:forgespi:0.13.0
    net.minecraftforge:coremods:0.6.3-milestone.0.4+c1d1f08
    net.minecraftforge:unsafe:0.2.0
    com.electronwill.night-config:core:3.6.0
    com.electronwill.night-config:toml:3.6.0
    org.jline:jline:3.9.0
    org.apache.maven:maven-artifact:3.6.0
    net.jodah:typetools:0.6.0
    org.apache.logging.log4j:log4j-api:2.11.2
    org.apache.logging.log4j:log4j-core:2.11.2
    net.minecrell:terminalconsoleappender:1.1.1
    net.sf.jopt-simple:jopt-simple:5.0.4
    com.github.jponge:lzma-java:1.3
    com.google.code.findbugs:jsr305:3.0.2
    com.google.errorprone:error_prone_annotations:2.1.3
    com.google.guava:guava:20.0
    com.google.guava:guava:25.1-jre
    com.google.j2objc:j2objc-annotations:1.1
    com.nothome:javaxdelta:2.0.1
    de.oceanlabs.mcp:mcp_config:1.14.4-20190719.225934@zip
    net.md-5:SpecialSource:1.8.5
    net.minecraftforge:binarypatcher:1.0.5
    net.minecraftforge:installertools:1.1.4
    net.minecraftforge:jarsplitter:1.1.0
    net.sf.jopt-simple:jopt-simple:4.9
    net.sf.jopt-simple:jopt-simple:5.0.4
    net.sf.opencsv:opencsv:2.3
    org.checkerframework:checker-qual:2.0.0
    org.codehaus.mojo:animal-sniffer-annotations:1.14
    org.ow2.asm:asm-analysis:6.1.1
    org.ow2.asm:asm-commons:6.1.1
    org.ow2.asm:asm-tree:6.1.1
    org.ow2.asm:asm:6.1.1
    trove:trove:1.0.2
    These libraries failed to download. Try again.

    org.ow2.asm:asm:6.2
    org.ow2.asm:asm-commons:6.2
    org.ow2.asm:asm-tree:6.2
    cpw.mods:modlauncher:3.0.2
    cpw.mods:grossjava9hacks:1.1.0
    net.minecraftforge:accesstransformers:0.16.0-shadowed
    net.minecraftforge:eventbus:0.10.3-milestone.0.1+1a5fa31-service
    net.minecraftforge:forgespi:0.13.0
    net.minecraftforge:coremods:0.6.3-milestone.0.4+c1d1f08
    net.minecraftforge:unsafe:0.2.0
    com.electronwill.night-config:core:3.6.0
    com.electronwill.night-config:toml:3.6.0
    org.jline:jline:3.9.0
    org.apache.maven:maven-artifact:3.6.0
    net.jodah:typetools:0.6.0
    org.apache.logging.log4j:log4j-api:2.11.2
    org.apache.logging.log4j:log4j-core:2.11.2
    net.minecrell:terminalconsoleappender:1.1.1
    net.sf.jopt-simple:jopt-simple:5.0.4
    com.github.jponge:lzma-java:1.3
    com.google.code.findbugs:jsr305:3.0.2
    com.google.errorprone:error_prone_annotations:2.1.3
    com.google.guava:guava:20.0
    com.google.guava:guava:25.1-jre
    com.google.j2objc:j2objc-annotations:1.1
    com.nothome:javaxdelta:2.0.1
    de.oceanlabs.mcp:mcp_config:1.14.4-20190719.225934@zip
    net.md-5:SpecialSource:1.8.5
    net.minecraftforge:binarypatcher:1.0.5
    net.minecraftforge:installertools:1.1.4
    net.minecraftforge:jarsplitter:1.1.0
    net.sf.jopt-simple:jopt-simple:4.9
    net.sf.jopt-simple:jopt-simple:5.0.4
    net.sf.opencsv:opencsv:2.3
    org.checkerframework:checker-qual:2.0.0
    org.codehaus.mojo:animal-sniffer-annotations:1.14
    org.ow2.asm:asm-analysis:6.1.1
    org.ow2.asm:asm-commons:6.1.1
    org.ow2.asm:asm-tree:6.1.1
    org.ow2.asm:asm:6.1.1
    trove:trove:1.0.2

     

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