Ultimate Facebook - User registration is currently not allowed.

I have several WPMU DEV plugins active, such as Events+ and Ultimate Facebook. On Ultimate Facebook, I am trying to allow users to register via Facebook and have an app setup for that function. I can autopost and the API shows connected with extended permissions granted, but I keep getting a "User registration is currently not allowed." message when trying to login via Facebook.

I tried going to Events+ and clicking the already using Facebook API box, but I still get the same error. Any ideas on what I am missing?