Crash on Launch

[ArchieA10]

Your Pack Version

1.6.0

Type of Instance

Single Player

Your Actions

Crashes immediately upon launching using MultiMC. Generally shows that it crashes 1-2 seconds after clicking launch

Crash Report

Failed to start Minecraft: 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') at net.minecraft.launchwrapper.Launch.(Launch.java:34) at net.minecraft.launchwrapper.Launch.main(Launch.java:28) at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:104) at java.base/java.lang.reflect.Method.invoke(Method.java:578) at org.multimc.onesix.OneSixLauncher.launchWithMainClass(OneSixLauncher.java:243) at org.multimc.onesix.OneSixLauncher.launch(OneSixLauncher.java:278) at org.multimc.EntryPoint.listen(EntryPoint.java:143) at org.multimc.EntryPoint.main(EntryPoint.java:34) Exiting with -1 Process exited with exit code -1 (0xffffffffffffffff).

Final Checklist

• [X] I have provided all the required crash reports/logs.
• [X] I have searched this issue tracker and there is nothing similar already.
• [X] I can reproduce this crash consistently by following the exact steps I described above.

[DrParadox7]

Provide the required crash report

[DrParadox7]

User is likely using Java 9 or above, which is not compatible with the pack.