When installing forge on a cubedhost multicraft server I got this error -
17.10 15:20:12 [server] INFO at cpw.mods.fml.relauncher.ServerLaunchWrapper.main(ServerLaunchWrapper.java:17)
17.10 15:20:12 [server] INFO at cpw.mods.fml.relauncher.ServerLaunchWrapper.run(ServerLaunchWrapper.java:30)
17.10 15:20:12 [server] INFO at java.lang.Class.forName(Class.java:270)
17.10 15:20:12 [server] INFO at java.lang.Class.forName0(Native Method)
17.10 15:20:12 [server] INFO at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
17.10 15:20:12 [server] INFO at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
17.10 15:20:12 [server] INFO at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
17.10 15:20:12 [server] INFO at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
17.10 15:20:12 [server] INFO at java.security.AccessController.doPrivileged(Native Method)
17.10 15:20:12 [server] INFO at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
17.10 15:20:12 [server] INFO at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
17.10 15:20:12 [server] INFO You will need to add them to your server before FML and Forge will run successfully.java.lang.ClassNotFoundException: net.minecraft.launchwrapper.Launch
17.10 15:20:12 [server] INFO We appear to be missing one or more essential library files.
This wasn't the only time, I stuck to ftb because of the bug for ahwhile but a new mod came out.