I froze Facebook Authenticator using Titantium Backup. I realized this then broke my ability to upload contacts from facebook into my contacts list. I defrosted facebook authenticator. I went to settings then accounts. It shows no facebook account. I click add account, then I click facebook, and it says facebook account already exists, cannot add new account. I can't seem to delete the facebook account, because i can't see it anywhere else. What can I do?