Infinite Loading Screen

I have the same issue. I can't play my game at all. This might be the right track though, not sure:

I play in a historical save file. I was having an issue where my cows would not show up in their shed. I kept buying new cows only for them to get stuck in cow purgatory (my household inventory), unable to be rescued. "Assign animal to shed" did not work. Deleting the shed did not work. I kept getting notifications about my sad cows. I had the same household inventory for six generations and the cows didn't die. I had the heir move to a new household to clear the inventory. Bought a cow. Big mistake. Cycle repeated, but since it wasn't technically breaking my game I ignored it.

After this patch, the only households that give me the infinite loading screen are ones that had the cow glitch. This includes any sim that was previously in a household with the glitch (example, one of my heir's sisters moved in with her husband. Their family won't load either.) All other households load. This was after I removed all mods, cleared cache and reinstalled the game -- the only thing I brought back to the new folders was my saves. I even tried moving the families to new "households" by moving one out and then doing the "add to family" cheat on the rest of them, but I got the infinite loading screen again when the family was back together. Restoring old saves did not fix this either. Also worth noting that I can't visit cow-plagued lots with families that will load either.

TLDR; cows might be too blame?

Don't know if anyone else's infinite loading families had cows in it, but it's all I have to go on after 3 days of trying to fix this. Could be right, could be wrong, but I'm desperate after being unable to get my sims stress relief ☹️