Problem to launch the game

[petrepe]

Hi everyone... i have problem with launch any server through the launcher. I got everytime error: 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)
Process ended with code: 1

 

Do you guys know how to help me?

[brunyman]

Is this on our launcher? On what modpack and what java version do you have installed?

[petrepe]

Ofcourse its your launcher. The java version is 17.0.1 and ive tried few modpacks and the problem was the same

[brunyman]

Keep in mind that you will need to use the right java version for each minecraft version, like java 17 for MC 1.16 and java 8 for MC 1.12

You can right click on each modpack and configure the settings, I will post a screenshot shot below: