Hi, i'm trying to run the latest recommended version of forge and I seem to be unable to get the server to start.

Upon executing the server jar after running the server installer it spits out errors and quits.

 

I'm running this from a fresh install of Linux Mint 64 bit so i might be missing dependencies/libraries but I couldn't find any kind of tutorial showing me where to get these.

 

output of  java -jar forge-1.12.2-14.23.1.2555-universal.jar

 

A problem occurred running the Server launcher.java.lang.reflect.InvocationTargetException
        at sun.reflect.NativeMethodAccessorImpl.invoke0(java.base@9-internal/Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(java.base@9-internal/NativeMethodAccessorImpl.java:62)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(java.base@9-internal/DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(java.base@9-internal/Method.java:531)
        at net.minecraftforge.fml.relauncher.ServerLaunchWrapper.run(ServerLaunchWrapper.java:62)
        at net.minecraftforge.fml.relauncher.ServerLaunchWrapper.main(ServerLaunchWrapper.java:31)
Caused by: java.lang.ClassCastException: jdk.internal.loader.ClassLoaders$AppClassLoader (in module: java.base) cannot be cast to java.net.URLClassLoader (in module: java.base)
        at net.minecraft.launchwrapper.Launch.<init>(Launch.java:34)
        at net.minecraft.launchwrapper.Launch.main(Launch.java:28)
        ... 6 more
 

Thanks in advanced!

Java 9 isn't supported currently, you need to use Java 8 for now.