Problem Cant start

[albinerikss0n]

When i trying to start my server its says:

Starting server
A problem occurred running the Server launcher.java.lang.reflect.InvocationTargetException
        at jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(java.base@9-Ubuntu/Native Method)
        at jdk.internal.reflect.NativeMethodAccessorImpl.invoke(java.base@9-Ubuntu/NativeMethodAccessorImpl.java:62)
        at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(java.base@9-Ubuntu/DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(java.base@9-Ubuntu/Method.java:535)
        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

I am running the server on Ubuntu 16.10
Modpack: FTB Bayond

 

[mc.crab]

Put the log here http://paste.feed-the-beast.com/ and post the link here.

 

[Henry Link]

What version of Java are you running? It really should be version 8. Not 7 or 9.