Multi mc keeps crashing error 255

i just got mc downloaded and put rlcraft into add instance like normal then sfter i click to play it says at the vearry bottom error 255 here the log



MultiMC version: 0.6.11-custom










Minecraft folder is:


/home/lgreen/.local/share/multimc/instances/RAD-LITE-1.3 (1)/minecraft










Java path is:


/usr/bin/java










Java is version 11.0.9.1, using 64-bit architecture.










Intel(R) Core(TM) i5-4690K CPU @ 3.50GHz


NVIDIA Corporation GM204 [GeForce GTX 970] (rev a1)






Subsystem: eVga.com. Corp. Device 2974






Kernel driver in use: nvidia






OpenGL version string: 4.6.0 NVIDIA 455.45.01






Main Class:


net.minecraft.launchwrapper.Launch






Native path:


/home/lgreen/.local/share/multimc/instances/RAD-LITE-1.3 (1)/natives






Libraries:





Failed to start Minecraft:


Exiting with -1


java.lang.reflect.InvocationTargetException


at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)


at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)


at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)


at java.base/java.lang.reflect.Method.invoke(Method.java:566)


at org.multimc.onesix.OneSixLauncher.launchWithMainClass(OneSixLauncher.java:196)


at org.multimc.onesix.OneSixLauncher.launch(OneSixLauncher.java:231)


at org.multimc.EntryPoint.listen(EntryPoint.java:143)


at org.multimc.EntryPoint.main(EntryPoint.java:34)


Caused by: 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.<init>(Launch.java:34)


at net.minecraft.launchwrapper.Launch.main(Launch.java:28)


... 8 more


Process exited with code 255.
i am using linux