JVM info: Oracle Corporation - 1.8.0_341 - 25.341-b10
java.net.preferIPv4Stack=true
Found java version 1.8.0_341
Extracting json
Considering minecraft client 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.Alert.createSSLException(Unknown Source)
    at sun.security.ssl.TransportContext.fatal(Unknown Source)
    at sun.security.ssl.TransportContext.fatal(Unknown Source)
    at sun.security.ssl.TransportContext.fatal(Unknown Source)
    at sun.security.ssl.CertificateMessage$T12CertificateConsumer.checkServerCerts(Unknown Source)
    at sun.security.ssl.CertificateMessage$T12CertificateConsumer.onCertificate(Unknown Source)
    at sun.security.ssl.CertificateMessage$T12CertificateConsumer.consume(Unknown Source)
    at sun.security.ssl.SSLHandshake.consume(Unknown Source)
    at sun.security.ssl.HandshakeContext.dispatch(Unknown Source)
    at sun.security.ssl.HandshakeContext.dispatch(Unknown Source)
    at sun.security.ssl.TransportContext.dispatch(Unknown Source)
    at sun.security.ssl.SSLTransport.decode(Unknown Source)
    at sun.security.ssl.SSLSocketImpl.decode(Unknown Source)
    at sun.security.ssl.SSLSocketImpl.readHandshakeRecord(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:243)
    at net.minecraftforge.installer.DownloadUtils.downloadManifest(DownloadUtils.java:307)
    at net.minecraftforge.installer.json.Util.getVanillaVersion(Util.java:73)
    at net.minecraftforge.installer.actions.ClientInstall.run(ClientInstall.java:89)
    at net.minecraftforge.installer.InstallerPanel.run(InstallerPanel.java:423)
    at net.minecraftforge.installer.SimpleInstaller.launchGui(SimpleInstaller.java:175)
    at net.minecraftforge.installer.SimpleInstaller.main(SimpleInstaller.java:147)
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)
    ... 25 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)
    ... 31 more
Failed to download version manifest, can not find client jar URL.
 

In order to root out one of the more common issues, we'll need to see your hosts file. Here's the steps to getting this file.

1) Press the Win + R key on your keyboard.

2) Paste the following into the prompt that opens: notepad %windir%\system32\drivers\etc\hosts

3) Use Ctrl+A to select everything in the file, then Ctrl+C into the textbox to post to this thread.

On 10/16/2022 at 2:45 PM, ChampionAsh5357 said:

In order to root out one of the more common issues, we'll need to see your hosts file. Here's the steps to getting this file.

1) Press the Win + R key on your keyboard.

2) Paste the following into the prompt that opens: notepad %windir%\system32\drivers\etc\hosts

3) Use Ctrl+A to select everything in the file, then Ctrl+C into the textbox to post to this thread.

i have the same problem. this what i got in the notepad.

 

# AutoGenerated by Microsoft (R) Malware Protection Engine.
# Copyright (c) 1993-2009 Microsoft Corp.
#
# This is a sample HOSTS file used by Microsoft TCP/IP for Windows.
#
# This file contains the mappings of IP addresses to host names. Each
# entry should be kept on an individual line. The IP address should
# be placed in the first column followed by the corresponding host name.
# The IP address and the host name should be separated by at least one
# space.
#
# Additionally, comments (such as these) may be inserted on individual
# lines or following the machine name denoted by a '#' symbol.
#
# For example:
#
#      102.54.94.97     rhino.acme.com          # source server
#       38.25.63.10     x.acme.com              # x client host

127.0.0.1       localhost
::1             localhost

#<block-adobe>
127.0.0.1 activate.adobe.com
127.0.0.1 practivate.adobe.com
127.0.0.1 ereg.adobe.com
127.0.0.1 wip3.adobe.com
127.0.0.1 activate.wip3.adobe.com
127.0.0.1 3dns-3.adobe.com
127.0.0.1 3dns-2.adobe.com
127.0.0.1 adobe-dns.adobe.com
127.0.0.1 adobe-dns-2.adobe.com
127.0.0.1 adobe-dns-3.adobe.com
127.0.0.1 ereg.wip3.adobe.com
127.0.0.1 activate-sea.adobe.com
127.0.0.1 wwis-dubc1-vip60.adobe.com
127.0.0.1 activate-sjc0.adobe.com
127.0.0.1 hl2rcv.adobe.com
127.0.0.1 lm.licenses.adobe.com
127.0.0.1 na2m-pr.licenses.adobe.com
127.0.0.1 lmlicenses.wip4.adobe.com
127.0.0.1 lm.licenses.adobe.com
127.0.0.1 na1r.services.adobe.com
127.0.0.1 hlrcv.stage.adobe.com
127.0.0.1 practivate.adobe.com
127.0.0.1 activate.adobe.com
#</block-adobe>

0.0.0.0 mc.corel.com
0.0.0.0 apps.corel.com
0.0.0.0 origin-mc.corel.com
0.0.0.0 iws.corel.com
0.0.0.0 compute-1.amazonaws.com  
0.0.0.0 ipm.corel.com  
0.0.0.0 dev1.ipm.corel.public.corel.net 

Please create your own thread and post the installer log (it is created in the same folder as where you have the installer jar).

There is nothing wrong with your hosts file.

The other usual reason for the above error message is using a very old version of java. Make sure your java is up-to-date or download a recent version like: https://adoptium.net/