[Xrati]

If there was an error running the turn, it would be listed in the turn history. I used to get turn error messages every once in a while and would have to run the turn off-line. It would state that the turn could not be run.
It may be that the GM used the offline turn to set the players to computer control in his GM panel. That would explain the sudden attacks by the AI. They should now be active and you will notice them moving around and declaring "WAR" with you.