So, I'm playing a domination game as Scythia. I've conquered a few dozens cities and am in the information era.

Anyway, recently I had a war with Sumeria in which I ended up trying to capture their capital at the time (Vilnius). I brought its health to nearly nothing and tried to capture it. My game crashed.

I couldn't figure out why, so I moved on to their next city. When I tried to take it, the game crashed.

Then I tried to sign a peace treaty in which he signed over one of those cities. I clicked okay and... the game crashed.

Anybody got any clue what this is about or how I might be able to solve the problem?