I think I've found why the game crash a lot with a log filled with "NullReferenceException".
Whenever I touch to the decor part of the game, it tend to crash very easily.
- Selecting a decor building (statue, flower pot, blank canvas...) in order to place it.
- Building one.
- Displaying the decor overlay, maybe when it's updating where the mouse cursor is (finishing a decor building, a dupe pass with drab clothes...)
Hope I helped you for fixing this bug, it's kind of hard to play with it, as it crashes the game a lot.
Do anything that is decor-related, as building a decor furniture, displaying the decor overlay...