zewin

I try to turn on the server but it never turns on it always writes this error. thank you for your help and understanding. 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 cpw.mods.fml.relauncher.FMLRelauncher.<init>(FMLRelauncher.java:60) at cpw.mods.fml.relauncher.FMLRelauncher.instance(FMLRelauncher.java:52) at cpw.mods.fml.relauncher.FMLRelauncher.handleServerRelaunch(FMLRelauncher.java:45) at net.minecraft.server.MinecraftServer.main(MinecraftServer.java:1367)