Sorry, this account is not active

I’m getting an error “Sorry, this account is not active” when someone attempts to register for my site at http://www.tncsg.org

I thought there may have been a conflict with theme my login, but nothing changed after deactivating that plugin.

I prefer the pop up window. However, I run into a different issue.

Upon registering I see a message about subscriptions instead of being redirected to the welcome page.

I also see that same issue when attempting to login from the login form on the popup box found at : tncsg.org/student-enrollment