I've just tried both with autoresolve and battle and didn't have a crash.
did your general died during the battle?
think that you have inner pc issues, can't see another solution tbh
here is the post manual battle save
https://www.mediafire.com/file/ljhbd...ttle.save/file
also... you're having a rebellion in the 10th turn
that's not good, do something for you PO, like removing taxes in that region, enacting the civil intrigue and placing rpg units
otherwise you'll just loose more money for recruiting useless armies