I removed /msg from the plugin. You can only use /f msg to send private messages now. I currently working on a MSG-Addon which will add the /msg and /r command for those who want to use this instead of /f msg. It will be released in a few days.

Bugfixes:
The bug with msg that the players werent found should be fixed.
The error that occured by performing /f msg without a name is fixed