Pezus

Hello, I am having trouble with opening minecraft in eclipse, whenever I try to run minecraft, this comes out of the console: [2020-09-04 16:50:54] [INFO ] Natives: E:\forge-1.12.2-14.23.5.2854-mdk\build\natives WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by net.minecraftforge.legacydev.MainClient (file:/C:/Users/Johncito/.gradle/caches/modules-2/files-2.1/net.minecraftforge/legacydev/0.2.3.1/f2cd4a8c9f09faf1c1e4a9a4c65df36e634f95db/legacydev-0.2.3.1-fatjar.jar) to method java.lang.ClassLoader.initializePath(java.lang.String) WARNING: Please consider reporting this to the maintainers of net.minecraftforge.legacydev.MainClient WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-09-04 16:50:54] [INFO ] Main Class: net.minecraft.launchwrapper.Launch [2020-09-04 16:50:54] [INFO ] Srg2Mcp: E:\forge-1.12.2-14.23.5.2854-mdk\build\createSrgToMcp\output.srg [2020-09-04 16:50:54] [INFO ] Extra: [] [2020-09-04 16:50:54] [INFO ] Running with arguments: [--version, 1.12, --assetIndex, 1.12, --assetsDir, C:\Users\Johncito\.gradle\caches\forge_gradle\assets, --accessToken, {REDACTED}, --userProperties, [], --tweakClass, net.minecraftforge.fml.common.launcher.FMLTweaker] Exception in thread "main" java.lang.reflect.InvocationTargetException at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.base/java.lang.reflect.Method.invoke(Method.java:564) at net.minecraftforge.legacydev.Main.start(Main.java:86) at net.minecraftforge.legacydev.MainClient.main(MainClient.java:29) 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) ... 6 more Can anyone help me? I have no idea on what to do. Thanks in advance!