Please use this thread going forward: Save Game Corruption (Disappearing Lots/Error 800 or 801) | EA Forums - 5037272
I hate to be the one to have to tell you this but when that starts happening, the save is corrupt. It will only get worse if you try to keep playing the save. It's an issue that has been happening off and on for several RL years and predates For Rent. It has been happening more since For Rent though judging from the number of posts here at AHQ. For all intents and purposes, why it happens is still unknown as there are so many possibilities as to what causes it. The link to the main bug thread is below. The first report is from 2021. You might want to me too the first post in the thread.
The bottom line is that the lots that have the orange or green triangle with an exclamation point are corrupt. You can try to save them but it's unlikely that you will be able to or if you can, they won't be right and could possibly corrupt any save you reinstall them in. The same goes for any households that were on the corrupted lot.
And while it might not mean much to you, I lost my long term 7-year-old main save to it last year. Believe me, I tried everything I knew to save it but, in the end, there's nothing I did or could find to save if. So, the only thing you can do is salvage what you can and start over in a new save. One thing I find interesting though about the pics you posted is that I was able to track the problem back to when it started because I make a copy of all my saves before any updates or new pack installs. Mine started about 4 months before I caught it in Magnolia Promenade, then moved to Forgotten Hollow and then to Oasis Springs. It started in April, and I caught it in late July. And your comment that it hit your game in the same order as it did mine makes me wonder now if it progresses the same way for everyone. I know from the main thread though that it does hit other worlds so if might differ depending on what packs someone has. I have all packs.
Hope this helps.
Thank you so much for letting me know. I've been at my wit's end trying to figure this out. I have discovered that the lots are forever corrupt. I've tried to go back to previous saves, but it seems to manifest quickly after some play time, and always faster if I am playing on a Residential Rental lot. Looks like it's time to save my Sim families and start fresh. *Sigh*
