LilyPad

I can run 1.12.2 vanilla and forge without any issues; however, I wanted to use a hacked client and this error was shown in my game logs. Failed to start Minecraft: 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 org.multimc.onesix.OneSixLauncher.launchWithMainClass(OneSixLauncher.java:210) at org.multimc.onesix.OneSixLauncher.launch(OneSixLauncher.java:245) 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) at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:104) ... 5 more I don't really know what happened, I am using MultiMC as my launcher and trying to run the lambda hacked client.