Hello,

I get this error when trying to run the client

 

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')
    at net.minecraft.launchwrapper.Launch.<init>(Launch.java:34)
    at net.minecraft.launchwrapper.Launch.main(Launch.java:28)

What Java version are you using and what Minecraft version?

Java 8 and Forge 1.8.9

This exact setup worked on windows 11, then i downgraded and it doesnt work no matter if i do it the same way i have done or a new way

@ChampionAsh5357

java 8 and 1.8.9

6 hours ago, stunni said:

This exact setup worked on windows 11, then i downgraded and it doesnt work no matter if i do it the same way i have done or a new way

Then I would imagine that the cast exception comes from an incorrect JDK since I believe 1.8 used Java 7 iirc.

Regardless, the version you are using is no longer supported on this forum.

Please update to a modern version of Minecraft to receive support.

Currently, supported versions are 1.19.4 (Latest) and 1.18.2 (LTS).