[KingyKings]

I used to have this problem. You are most likely Missing a plugin or a Plugin is not working. Check that all the plugins you need are in the sever.cfg. It might be the login system you are using. For example lux admin. Make sure you have the Whirlpool and all the plugins that it came with working. Im guessing you are using windows so make sure in the sever.cfg you add a "plugins" line and [name].dll