Altta hatayı yazıyorum belki çeviriden falan lazım olur ?
You have selected to send the welcome PM upon registration, before activation, but your Awaiting Activation usergroup does not have permission to use Private Messaging System.
To correct this error, either change the permissions of the Awaiting Activation Usergroup to enable the use of PMs, or select to send the Welcome PM on Account Activation, or set the plugin to send an email only, or select your Registration Method to be Instant Activation / Send Random Password.