I am building a residential rental as a residential lot and I was play testing a home and my sims couldn't go through the door to the kids room. I removed move objects cheat and then noticed that the doors were sitting on top of the walls unable to be used as doors.
I had platforms so I removed those to test it and despite their being no platforms anywhere on the lot I still couldn't do anything.
I deleted the walls and replaced them deleted a wardrobe deleted all my mods and NOTHING is working.
Edit By crinrict: Adjusted Title