Moving the household to a new lot and then back seemed to have done the trick. I did switch active households for a few days as well just to be sure. I restarted the game to make sure the fix was permanent and it seems to be! Thank you for your help! I was ready to just move on to a new household si...

I tried to get on my Sims 3 save file today and I had an issue where the UI wasn't functioning properly (you couldn't click anything on it, you couldn't expand to see the moods, inventory, etc; the squares for the character portraits were gone; the panels were empty; household funds were at 0). To r...