I don't work or have any association with EA. I give advice to the best of my knowledge and cannot be held responsible for any damage done to your computer/game.
Please only contact me via PM when asked to do so.
a month ago
I also have this issue, but it started occurring for me before buying the paranormal pack. It rendered visiting some apartments impossible while playing, but occasionally my sim would enter an apartment autonomously after starting a conversation with the inhabitants, and even interact with items within the apartment while everything was still invisible. The sim in question would also become invisible upon entering the apartment. I believe that this glitch is independent of the paranormal pack though.