Ideas
I have since figured out that the issue must be with the lot. If I bulldoze the lot and then load the game, it loads fine, and I am able to replace the lot from my library and play, but trying to return to the home lot from anywhere else doesn't work (the lot loads but my sim disappears), and if I save and exit I'm once again stuck on the endless loading screen.
I also tried replacing the bulldozed lot with the standard setup as I saved it when my sim first moved in, but that also doesn't work. The only way I can load this household is by loading it onto an empty lot.
Maybe this is just the universe telling me I've wasted too much time on this game lol
i've been able to open my off-grid lots in build mod and just remove the off-grid lot trait. After that the lot loaded fine with no bulldozing, it was deffo the trait. Mine broke with the dx11 upgrade as well. It kinds sucks because I play a lot of off-grid and I don't want to lose my families to corruption, so I'm afraid to make any lot off the grid.