I have the same problem, I finished the Operation Tribute, I bought the Commendation Pack and exit the game. When I have tried to enter again in multiplayer I received the message with the Online Pass (I have PC/Origin), I can play one player campaign without problems, but the multiplayer is impossible.
The Galaxy at War map do not charge, and when I try to play multiplayer appear the error with the Online Pass.
As other player I have tried re-login in Origin, repair the instalation, check updates, but...
Regards,