Plugins won't work.

[kezard]

In my server when trying to use the plugins mines it says internal error. This also happens for some of my other plugins.

[PandaChan]

Make sure you restart your server after adding plugins, also make sure you're opped (if you're using a perms plugins you might need to add * to yourself. 

If after doing those ^ steps it still doesn't work, that plugin might be outdated.