Game crashing when interacting with an apartment building

Hi! I tried your steps but sadly that didn't work as well.

I chatted with the help as well but nothing worked.

In the meanwhile I also tried to move The Sims 4 folder onto my desktop and with a new saving file I could modify the lot and play in it, so I fear it might be a saving problem (I tried to recover old saving files but the oldest I can find still has the problem. Especially, I don't know how long this has happened because I haven't played with those families in a while). I also tried to move the family out and back in and tried to enter build mode when one of the lot was empty, but that didn’t work. As well I cannot visit any of the lots or families with other sims.

I hope there is another way to fix this other than ditching the saving completely just for one building complex since I’ve been playing with it for more than 2 years.

Sadly the only recovering saves I can get are the ones of two days ago that the game allows me to load because, for some reason, the whole save seems saved only on a few latest files. For example, even if I have the savings going a long while back, if I remove the files of the last 2-3 days it's like the saving doesn't exist.

So, I fear the only option I have to avoid ditching the whole save is move everyone out of that apartment complex and ignore it. It is particularly annoying since it's 4 whole apartments that are now inaccessible and not a single lot, but I guess that will have to do.

Maybe with one of the next update it will fix itself, probably not.

However, thank you so much for your help!

Update: the problem did not only stick to the Culpepper apartment building, but it seems to happen when I'm trying to enter the house nearby (the only single house in San Myshuno), but I've never touched it until now so I don't know how long it has been happening for that house, and the karaoke bar as well.

The other apartment building of the block is however fine, but I noticed that on the block the items of the festivals are overlapping because they're not disappearing... might that be the problem? I'll take any possible help since this took away 5 livable lots and a public location for no apparent reason and it's definitely annoying.