Minecraft forge 1.12.2 server

[AC_1]

(Sorry for my worst english.)

I want to make a forge 1.12.2 server for this I have in the start.bat file

"java -Xmx8G -jar server.jar nogui
PAUSE"

Is written to run the forge file. But I only get an error message that looks like this:

"C:\Users\Keller\Desktop\Elementguardian E>java -Xmx4G -jar server.jar
Picked up _JAVA_OPTIONS: -Xmx12288m
A problem occurred running the Server launcher.java.lang.reflect.InvocationTargetException
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)
        at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.base/java.lang.reflect.Method.invoke(Method.java:568)
        at net.minecraftforge.fml.relauncher.ServerLaunchWrapper.run(ServerLaunchWrapper.java:70)
        at net.minecraftforge.fml.relauncher.ServerLaunchWrapper.main(ServerLaunchWrapper.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)
        ... 6 more

C:\Users\Keller\Desktop\Elementguardian E>PAUSE
Press any key . . ."

please help me. idk what to do