Following up on my comment down below- I seem to have narrowed down the cause of my crashes. I played through the game again on 0.16.5. I completed Golem Princess's questline (involving the Clockwork Heart, right after she decreases diplomacy between all other regions), then on going to bed that night, the game crashed with the same line 455 ArgumentError. This was exactly what I was doing before the crashes on 0.16.4, as well.
