Error When Running Forge Server Java File

[SchoolBusesC2]

When I try to run the forge server jar in the command line, I get this error message:

schoolbusesc2@server:~/Documents/Minecraft Server$ java -jar forge-1.12.2-14.23.5.2847-universal.jar
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:62)
        at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.base/java.lang.reflect.Method.invoke(Method.java:566)
        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

I have tried reinstalling, but still same message.

Edited April 6, 2020 by SchoolBusesC2

[Ugdhar]

1.12 is no longer supported on these forums due to age.

Please update to a modern version to receive support here.

 

More information on supported versions can be found in the LTS link at the top of every page.

[SchoolBusesC2]

Quote

1.12 is no longer supported on these forums due to age.

Please update to a modern version to receive support here.

The problem is that some of my mods only go up to 1.12.2. So I have to use this version, but it is not working.

Edited April 6, 2020 by SchoolBusesC2

[Ugdhar]

7 minutes ago, SchoolBusesC2 said:

The problem is that some of my mods only go up to 1.12.2. So I have to use this version, but it is not working.

I was just letting you know.

Once a moderator sees this topic, it will be locked, I just saved them the effort of explaining why.