So I was just finishing up the AI at the end of the game, 4 turns left until turn 300, and then I get forced into a peace offer with Persia, but the thing is the peace deal is just blank, there's no buttons, no terms no nothing. So cant finish the game :/

Same just happened to me. 39 turns from the end too.

RetroJackal wrote:

Same here just came across this as I was having my first war, on turn 201

Have this bug as well.

+1

The exact same thing happened to me.

Happened to me also.
To me it happened when having 2+ wars at the same time.
I have the saves to replicate the bug if needed.

Same here, round 225.

Patrek wrote:

Happened to me also.
To me it happened when having 2+ wars at the same time.
I have the saves to replicate the bug if needed.

Yes I've also come to this conclusion, I was in 2 wars at the same time and when one of them resolves it breaks the war resolution for the other war. 

I hope this can be hotfixed soon as it is completely game breaking when it happens. You can avoid it by not declaring multiple wars at the same time, but now I'm always worried about having an enemy declare on me whilst I am already at war.