Customization with Minecraft - cant open rlcraft modpack

Technical Support
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1

System Information

Field Value
Operating System Linux - Debian GNU/Linux 12 on x86_64
Product AMP ‘Decadeus’ v2.4.7.0 (Mainline)
Virtualization Docker
Application Minecraft
Module MinecraftModule
Running in Container Yes
Current State Failed

Problem Description

Issue

traing to open server with rlcraft but it dont seems to work reguardless of what i do

Reproduction Steps

  • chose forge version and download it
  • upload the server files
  • tried to open the server
2

What error are you getting in the console?

3

A problem occurred running the Server launcher.java.lang.reflect.InvocationTargetException

at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:110)

at java.base/java.lang.reflect.Method.invoke(Method.java:577)

at net.minecraftforge.fml.relauncher.ServerLaunchWrapper.run(ServerLaunchWrapper.java:70)

at net.minecraftforge.fml.relauncher.ServerLaunchWrapper.main(ServerLaunchWrapper.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.(Launch.java:34)

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

at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:104)

… 3 more

4

Make sure you’re using the right Java runtime for the version of MC you’re running.
Java 8 for 1.12.2
Java 8 or 11 for 1.16.5
java 16 for 1.17
Java 17 for 1.18+