I was going to add a screenshot from my game that I've been having this issue on, however for the first time in 24 hours it has allowed me to finally save so I'm not locked in the same 8 hours I was playing like an electronic groundhog day. Not sure if this will last at all so I'll document my issue still.
Issue started on 8/3/2022 (game had crashed shortly after midnight - I took this as a sign to go to bed so I did not play until probably 12 hours later) on my Not So Berry save (I'm about to start the final gen so if I have to lose this save I'm going to be livid), at first it wasn't too bad and I can play a few days in game before the saving error would begin. I've gone through the birth and aging up into toddlers of two of my children more times than I can count and I am kind of over it (my second child is now finally saved in the child stage of life so hey baby steps).
I do use mods however I've done the 50/50, made sure all mods I do have are entirely updated, I've completely removed all mods, I've repaired the game 3 times, and then backed up all of my mods and saves and uninstalled and reinstalled. None of those have fixed the issue.
After I reinstalled I went straight into my Not So Berry save, repeated groundhog day from 4am to 10:30am and received the same error.
So I took out one particular mod I had installed the day the error started (if I remember correctly - and yes the mod was updated on 8/1 for this patch) and then I started a new save to test on and at first when I loaded into the house it didn't let me save but then it did after I did a workaround of going to manage worlds, saving as, and did allow me to save a few times after that. Thinking that the issue was solved finally, I loaded into my Not So Berry save and attempted to replay the same 8 hours I had been stuck on and once again the save failed.
I don't have a screenshot right now of the error code however I did search it and the exact error code I'm getting is "532:e3295cb5:70f2348a" if it reappears (which I'm not exactly hopeful that it won't) I'll come back with a screenshot.