I've gotten into a state of the game whereby each and every battle I go into on the Campaign map does not allow me to select a general or retreat or enter a battle or anything. I'm in Act II on turn 27.

As soon as I end my turn, I skip the replay and click on the go to battles function. As soon as it goes to a battle I am supposed to be in, the retreat button etc grey out within a second and I have to alt-F4 the game