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ATlauncher will not launch minecraft


HarshTarsier290
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I get the error Launching Minecraft with the following arguments (user related stuff has been removed): [C:\Program Files\Java\jdk-14.0.1\bin\javaw, -XX:-OmitStackTraceInFastThrow, -Xms512M, -Xmx4096M, -XX:MetaspaceSize=256M, -Duser.language=en, -Duser.country=US, -Dfml.log.level=INFO, -XX:+UnlockExperimentalVMOptions, -XX:+UseG1GC, -XX:G1NewSizePercent=20, -XX:G1ReservePercent=20, -XX:MaxGCPauseMillis=50, -XX:G1HeapRegionSize=32M, -Djava.library.path=USERSDIR\temp\natives-1122cabb397c4424aaf067c5256bc321, -cp, USERSDIR\libraries\net\minecraft\client\1.12.2\client-1.12.2.jar;USERSDIR\libraries\net\minecraftforge\forge\1.12.2-14.23.5.2847\forge-1.12.2-14.23.5.2847-universal.jar;USERSDIR\libraries\net\minecraft\launchwrapper\1.12\launchwrapper-1.12.jar;USERSDIR\libraries\org\ow2\asm\asm-all\5.2\asm-all-5.2.jar;USERSDIR\libraries\org\jline\jline\3.5.1\jline-3.5.1.jar;USERSDIR\libraries\net\java\dev\jna\jna\4.4.0\jna-4.4.0.jar;USERSDIR\libraries\com\typesafe\akka\akka-actor_2.11\2.3.3\akka-actor_2.11-2.3.3.jar;USERSDIR\libraries\com\typesafe\config\1.2.1\config-1.2.1.jar;USERSDIR\libraries\org\scala-lang\scala-actors-migration_2.11\1.1.0\scala-actors-migration_2.11-1.1.0.jar;USERSDIR\libraries\org\scala-lang\scala-compiler\2.11.1\scala-compiler-2.11.1.jar;USERSDIR\libraries\org\scala-lang\plugins\scala-continuations-library_2.11\1.0.2\scala-continuations-library_2.11-1.0.2.jar;USERSDIR\libraries\org\scala-lang\plugins\scala-continuations-plugin_2.11.1\1.0.2\scala-continuations-plugin_2.11.1-1.0.2.jar;USERSDIR\libraries\org\scala-lang\scala-library\2.11.1\scala-library-2.11.1.jar;USERSDIR\libraries\org\scala-lang\scala-parser-combinators_2.11\1.0.1\scala-parser-combinators_2.11-1.0.1.jar;USERSDIR\libraries\org\scala-lang\scala-reflect\2.11.1\scala-reflect-2.11.1.jar;USERSDIR\libraries\org\scala-lang\scala-swing_2.11\1.0.1\scala-swing_2.11-1.0.1.jar;USERSDIR\libraries\org\scala-lang\scala-xml_2.11\1.0.2\scala-xml_2.11-1.0.2.jar;USERSDIR\libraries\lzma\lzma\0.0.1\lzma-0.0.1.jar;USERSDIR\libraries\net\sf\jopt-simple\jopt-simple\5.0.3\jopt-simple-5.0.3.jar;USERSDIR\libraries\java3d\vecmath\1.5.2\vecmath-1.5.2.jar;USERSDIR\libraries\net\sf\trove4j\trove4j\3.0.3\trove4j-3.0.3.jar;USERSDIR\libraries\org\apache\maven\maven-artifact\3.5.3\maven-artifact-3.5.3.jar;USERSDIR\libraries\com\mojang\patchy\1.1\patchy-1.1.jar;USERSDIR\libraries\oshi-project\oshi-core\1.1\oshi-core-1.1.jar;USERSDIR\libraries\net\java\dev\jna\jna\4.4.0\jna-4.4.0.jar;USERSDIR\libraries\net\java\dev\jna\platform\3.4.0\platform-3.4.0.jar;USERSDIR\libraries\com\ibm\icu\icu4j-core-mojang\51.2\icu4j-core-mojang-51.2.jar;USERSDIR\libraries\net\sf\jopt-simple\jopt-simple\5.0.3\jopt-simple-5.0.3.jar;USERSDIR\libraries\com\paulscode\codecjorbis\20101023\codecjorbis-20101023.jar;USERSDIR\libraries\com\paulscode\codecwav\20101023\codecwav-20101023.jar;USERSDIR\libraries\com\paulscode\libraryjavasound\20101123\libraryjavasound-20101123.jar;USERSDIR\libraries\com\paulscode\librarylwjglopenal\20100824\librarylwjglopenal-20100824.jar;USERSDIR\libraries\com\paulscode\soundsystem\20120107\soundsystem-20120107.jar;USERSDIR\libraries\io\netty\netty-all\4.1.9.Final\netty-all-4.1.9.Final.jar;USERSDIR\libraries\com\google\guava\guava\21.0\guava-21.0.jar;USERSDIR\libraries\org\apache\commons\commons-lang3\3.5\commons-lang3-3.5.jar;USERSDIR\libraries\commons-io\commons-io\2.5\commons-io-2.5.jar;USERSDIR\libraries\commons-codec\commons-codec\1.10\commons-codec-1.10.jar;USERSDIR\libraries\net\java\jinput\jinput\2.0.5\jinput-2.0.5.jar;USERSDIR\libraries\net\java\jutils\jutils\1.0.0\jutils-1.0.0.jar;USERSDIR\libraries\com\google\code\gson\gson\2.8.0\gson-2.8.0.jar;USERSDIR\libraries\com\mojang\authlib\1.5.25\authlib-1.5.25.jar;USERSDIR\libraries\com\mojang\realms\1.10.22\realms-1.10.22.jar;USERSDIR\libraries\org\apache\commons\commons-compress\1.8.1\commons-compress-1.8.1.jar;USERSDIR\libraries\org\apache\httpcomponents\httpclient\4.3.3\httpclient-4.3.3.jar;USERSDIR\libraries\commons-logging\commons-logging\1.1.3\commons-logging-1.1.3.jar;USERSDIR\libraries\org\apache\httpcomponents\httpcore\4.3.2\httpcore-4.3.2.jar;USERSDIR\libraries\it\unimi\dsi\fastutil\7.1.0\fastutil-7.1.0.jar;USERSDIR\libraries\org\apache\logging\log4j\log4j-api\2.8.1\log4j-api-2.8.1.jar;USERSDIR\libraries\org\apache\logging\log4j\log4j-core\2.8.1\log4j-core-2.8.1.jar;USERSDIR\libraries\org\lwjgl\lwjgl\lwjgl\2.9.4-nightly-20150209\lwjgl-2.9.4-nightly-20150209.jar;USERSDIR\libraries\org\lwjgl\lwjgl\lwjgl_util\2.9.4-nightly-20150209\lwjgl_util-2.9.4-nightly-20150209.jar;USERSDIR\libraries\com\mojang\text2speech\1.10.3\text2speech-1.10.3.jar;USERSDIR\libraries\org\lwjgl\lwjgl\lwjgl-platform\2.9.4-nightly-20150209\lwjgl-platform-2.9.4-nightly-20150209-natives-windows.jar;USERSDIR\libraries\org\lwjgl\lwjgl\lwjgl-platform\2.9.2-nightly-20140822\lwjgl-platform-2.9.2-nightly-20140822-natives-windows.jar;USERSDIR\libraries\net\java\jinput\jinput-platform\2.0.5\jinput-platform-2.0.5-natives-windows.jar;USERSDIR\libraries\com\mojang\text2speech\1.10.3\text2speech-1.10.3-natives-windows.jar, net.minecraft.launchwrapper.Launch, --username, REDACTED, --version, 1.12.2, --gameDir, USERSDIR\instances\IndustrialBox, --assetsDir, USERSDIR\assets, --assetIndex, 1.12, --uuid, 111b15adb0414957baac13ebcd93ab71, --accessToken, REDACTED, --userType, legacy, --tweakClass, net.minecraftforge.fml.common.launcher.FMLTweaker, --versionType, Forge, --width=854, --height=480]
[9/15/2020 16:12:52 PM] Exception in thread "main" java.lang.ClassCastException: class jdk.internal.loader.ClassLoaders$AppClassLoader cannot be cast to class java.net.URLClassLoader (jdk.internal.loader.ClassLoaders$AppClassLoader and java.net.URLClassLoader are in module java.base of loader 'bootstrap')

how do i fix this? (for 1.12.2 minecraft)

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