Guys, i'm having the same problem. But i Solved it. I deleted in Facebook the application 'Gwibber'. Then I tried to add my Facebook account to Gwibber and the 'Add' button appears! Cheers.
Guys, i'm having the same problem. But i Solved it. I deleted in Facebook the application 'Gwibber'. Then I tried to add my Facebook account to Gwibber and the 'Add' button appears! Cheers.