Same issue. I downloaded a lot from the gallery which had a room that gives me the same error and now I can't delete the room or place another lot from the gallery as it gives me the same error message. Really annoyed. The lot seems to have been removed from the gallery at least.
I had this error and got the same message, and then I could not rotate or delete it any more, Luckily I just went back to the moment I picked it up.
So if you are in the building mode, you can withdraw from this action. Well, but unfortunately you have to guess that there is a problem.
