I have spent days building this apartment but every time I entered the lot zoning cheat, it says I need to change lot architecture. I cannot see anything wrong looking at any guidelines I can find, and I've never had this issue before when building apartments. I am definitely using the right doors and there are no passages I can see between apartments. I did have balconies for most apartments, but I removed all access to them in a desperate attempt to make it work, though there was only access to them through select apartments. I am at a loss as what to do.

I don't know if there is anywhere I can upload the package for people to look at, so if that is an option please let me know! I've never posted in any forums before.

Please attach some floorplan images, with walls up, so that we can see what's up.

Likely some sort of access issue. Seconding the request for floorplan images to investigate