This could be one possible reason. Are you still facing any issues? I'd advise in cases like these you to start by checking the system status on http://status.adobe.com/ . This would let you in case there are outages in the system.
Do let us know in case you are still facing this issue? There was an outage a couple of days ago which could have caused this. I'd advise in cases like these you could also check the system status on http://status.adobe.com/