Crash in late game

Hello all,
In my game I got all the civs and science done.
Won the game by cultural victory and chose "one more turn" option.
Now finishing war with england and sieging London and Manchester, and when I use any of my units to capture Manchester game crashes to desktop.
Tried with another turn, unit and so on, but nothing works.
Anyone got bypass or solution?

PS. I got another bug with researching civics, cause even I finished them all, I still have to choose and research 2 last in a tree. Every 4 turns...

 

Hey I just came to these forums, so the reply is really late.

I have a very similar looking problem except the opponent is Greece and Im not attacking yet. Two cities left which I could take at any time.
The game crashes when I end a turn. Happens in an instant, in game the screen flickers a bit and goes white for like less than second.
Then Im on Windows and Civ is closed. I pops up the "do you want to send a report" which I have sended. This crash happens always and
I don't have anything much to do in game except change builds on cities and change civics or goverment. Any of these doesn't change anything.

This thread has similar reports, but in normal game not this "continued after winning" stuff.
https://forums.civfanatics.com/threads/game-is-crashing.603249/

Thanks,
Lobster