Forum Settings tab not working (user CP)
 

A user on the forums has mentioned that the settings tab (user CP; such as https://www.vbulletin.com/forum/usercp.php) here, does not work.
Even administrator accounts get the same message;

http://puu.sh/23yTV

What could be causing this? I'd give you some leads but I dont have any, sorry.

Thank you for your time,
neya