As you may have noticed the Facebook connect app has been gone for some time. Currently, the Twitter app has also been disabled. This is due in part to some updates that have been made to the security aspects of the application on Twitter side, but also due to the fact that the aging forums software is on longer capable of supporting it.
So for the time being we've had to turn it off. When we upgrade the forums to a newer version we'll be able to turn the back on.
I do apologize for the inconvenience this causes, but from now on you'll need to log in via the traditional account sign in method.
Announcement: Social Media Login Apps are disabled until further notice
Posted by Kalidor