I think saw someone mention something similar on steam,
In one of the ancient Ruins theirs an AT-AT (which is awesome, but kills my guys half the time I try an take him on) when I finally do defeat him, one my guys runs over and takes the AT-AT onto a pet sleeping spot and then game closes goes straight to windows without an error message.
On another attempt just after the AT-AT got shot down, it looked like a pawn was making a move toward it, then the game closes and goes straight to windows without an error message.
For now I'm just avoiding that area. I did notice one of the messages state you're still working on vehicles, so perhaps this issue is related? I am running a gajillion mods at the same time so I wonder if that might also be causing a conflict. Is anyone aware of any related mods that might cause the issue I've described.
Also one of the things I wondered about is I have yet to see a game where the Rebel Alliance and Imperials are at war with each other. Both sent me traders at the same time and I thought for sure something was going to go down and I would get free loot, but no such luck. The Imperial tax is a nice touch though.