Re: New Users Cannot Register
Definitely try the basics of narrowing down the root of your problem. First, I’d probably download the maintenance mode plugin and let all your users know beforehand that you’ll be doing some testing in the wee hours of the late night. Then, deactivate all your plugins. Run the Default BP theme that shipping with your BP plugin, and update BP, too, if you’re not running the latest version. If everything works — registrations/postings/uploads/etc., you’ll know that it’s a plugin(s). To figure out which one(s) is the culprit, activate one by one and keep testing one by one — very labor/time intensive, but that’s usually how troubleshooting goes. Most likely, you’ll be able to figure out what’s wrong and contact the plugin developer for some pointers 
