When I reach turn 76 of the match and end my turn, it stops on "Turn pending" and the game does not continue. When I try to reload the autosave of turn 76, the game fails to load. I can succesfully load the autosave of turn 75, but then the same happens when I reach turn 76 again. 

The run is Babylonians -> Aksumites -> English, with my neighbours being Huns, Zhou and Achaemid Persians. I have 5 cities which cover about 15 territories. I don't know if any of this matters, but I'm describing the savegame just in case. 

I will try to reload from an even earlier autosave, and if that doesn't work I'll start a new game. Cheers!