Facebook Like and Comment Can't Show After Update to 2.0

I recently updated my Ultimate Facebook to ver 2.0. Nothing changed from prior configuration. All facebook API and Secret Key set according to my account in Facebook Developer. But nothing show in my post as before. Worse, I found this (check my image attachment) and also Save Button doesn't appear anymore in my Ultimate Facebook Plugin section. How can I solve this? This happen at 11:01 AM GMT +8 if this problem depend on Facebook Maintenance. Thank for any help