I need your guys's help . [Facebook problems]

So I was on my Facebook پروفائل right now & suddenly , this thing was writen on the screen ; ''Your account is currently unavailable due to a site issue. We expect this to be resolved shortly. Please try again in a few minutes.'' my friend had the same problems too , but right now she isn't on chat so I can't ask her . If anyone had the same problems can آپ please tell me for how long did آپ have to wait to sign in again ? Just advice me آپ know .