crash report

17:34:41.695
launcher
main
Have local file C:\Users\Jimmeh\Twitch\Minecraft\Install\libraries\org\scala-lang\scala-library\2.11.1\scala-library-2.11.1.jar but don't know what size or hash it should be. Have to assume it's good.
17:34:41.716
launcher
main
Couldn't fetch SHA1 checksum for https://modloaders.forgecdn.net/647622546/maven/org/scala-lang/scala-reflect/2.11.1/scala-reflect-2.11.1.jar
17:34:41.717
launcher
main
Have local file C:\Users\Jimmeh\Twitch\Minecraft\Install\libraries\org\scala-lang\scala-reflect\2.11.1\scala-reflect-2.11.1.jar but don't know what size or hash it should be. Have to assume it's good.
17:34:41.720
launcher
main
Couldn't fetch SHA1 checksum for https://modloaders.forgecdn.net/647622546/maven/org/scala-lang/plugins/scala-continuations-plugin_2.11.1/1.0.2/scala-continuations-plugin_2.11.1-1.0.2.jar
17:34:41.721
launcher
main
Have local file C:\Users\Jimmeh\Twitch\Minecraft\Install\libraries\org\scala-lang\plugins\scala-continuations-plugin_2.11.1\1.0.2\scala-continuations-plugin_2.11.1-1.0.2.jar but don't know what size or hash it should be. Have to assume it's good.
17:34:41.762
launcher
main
Couldn't fetch SHA1 checksum for https://modloaders.forgecdn.net/647622546/maven/org/scala-lang/scala-swing_2.11/1.0.1/scala-swing_2.11-1.0.1.jar
17:34:41.762
launcher
main
Have local file C:\Users\Jimmeh\Twitch\Minecraft\Install\libraries\org\scala-lang\scala-swing_2.11\1.0.1\scala-swing_2.11-1.0.1.jar but don't know what size or hash it should be. Have to assume it's good.
17:34:41.774
launcher
main
Couldn't fetch SHA1 checksum for https://modloaders.forgecdn.net/647622546/maven/org/scala-lang/scala-compiler/2.11.1/scala-compiler-2.11.1.jar
17:34:41.774
launcher
main
Have local file C:\Users\Jimmeh\Twitch\Minecraft\Install\libraries\org\scala-lang\scala-compiler\2.11.1\scala-compiler-2.11.1.jar but don't know what size or hash it should be. Have to assume it's good.
17:34:41.779
launcher
main
Couldn't fetch SHA1 checksum for https://modloaders.forgecdn.net/647622546/maven/org/scala-lang/scala-xml_2.11/1.0.2/scala-xml_2.11-1.0.2.jar
17:34:41.779
launcher
main
Have local file C:\Users\Jimmeh\Twitch\Minecraft\Install\libraries\org\scala-lang\scala-xml_2.11\1.0.2\scala-xml_2.11-1.0.2.jar but don't know what size or hash it should be. Have to assume it's good.
17:34:41.851
launcher
main
Couldn't fetch SHA1 checksum for https://modloaders.forgecdn.net/647622546/maven/org/apache/maven/maven-artifact/3.5.3/maven-artifact-3.5.3.jar
17:34:41.852
launcher
main
Have local file C:\Users\Jimmeh\Twitch\Minecraft\Install\libraries\org\apache\maven\maven-artifact\3.5.3\maven-artifact-3.5.3.jar but don't know what size or hash it should be. Have to assume it's good.
17:34:41.902
launcher
main
Couldn't fetch SHA1 checksum for https://modloaders.forgecdn.net/647622546/maven/org/scala-lang/scala-parser-combinators_2.11/1.0.1/scala-parser-combinators_2.11-1.0.1.jar
17:34:41.903
launcher
main
Have local file C:\Users\Jimmeh\Twitch\Minecraft\Install\libraries\org\scala-lang\scala-parser-combinators_2.11\1.0.1\scala-parser-combinators_2.11-1.0.1.jar but don't know what size or hash it should be. Have to assume it's good.
17:34:41.959
launcher
main
Couldn't fetch SHA1 checksum for https://modloaders.forgecdn.net/647622546/maven/org/scala-lang/scala-actors-migration_2.11/1.1.0/scala-actors-migration_2.11-1.1.0.jar
17:34:41.960
launcher
main
Have local file C:\Users\Jimmeh\Twitch\Minecraft\Install\libraries\org\scala-lang\scala-actors-migration_2.11\1.1.0\scala-actors-migration_2.11-1.1.0.jar but don't know what size or hash it should be. Have to assume it's good.
17:34:41.960
launcher
main
Checking installations.
17:34:41.961
launcher
main
Minecraft client forge-14.23.5.2847 is ready to start.
17:34:41.961
launcher
main
Starting!
17:34:42.171
launcher
main
Using default game log configuration client-1.12.xml (outputs XML)
17:34:42.308
launcher
main
Error: Could not find or load main class .
Java HotSpot(TM) 64-Bit Server VM warning: ignoring option PermSize=256m; support was removed in 8.0
17:34:42.308
monitor
Process Monitor
Process crashed with exit code 1