What is happening is that we have a very mysterious server issue, causing the Ironman-mode validation to fail. Its being investigated but unfortunately I can't give an ETA on when its going to be fixed.
No other aspects of the game are affected so you can still play single player without ironman mode as well as multiplayer as usual.
No other aspects of the game are affected so you can still play single player without ironman mode as well as multiplayer as usual.