The Facebook for some hours now it has fallen in several countries of the world, resulting in the users to see the "temporarily unavailable" notification on their screens, when logging in to Facebook.
Many users through twitter and other social media express the strong dissatisfaction of Facebook members who see their Facebook personal profile inactive.
From Facebook, however, it became known that they are facing some problems in platform, but which will be resolved as soon as possible.
So those users you deal with accordingly problem know that the problem is general.