@Anathos This is not the same error. Your error is this: Code (Text): Caused by: java.security.AccessControlException: access denied ("java.lang.RuntimePermission" "createSecurityManager") You have a security manager set up for your Java installation, which makes at-runtime code generation impossible. (something the plugin has to do). To fix this you will need to grant all (most?) permissions to the server. I don't know why you have this in the first place, as nobody else does, so I can only assume this was done on purpose. What version of java are you running this on? I recommend downgrading to Java 8 if problems continue.