[OPEN] [ECO] Door missing to apartment when NAP completed

I had this error as well. I was able to fix it by using the testing cheats and shift clicking on the mailbox to remove the Modern Development N.A.P. then I deleted the wall I had created next to the door. The door that comes in with the Modern Development takes up two spaces where the original only uses one. I then used the shift click to put the Modern Development N.A.P. back into effect after removing the wall and the door was there.