Yeah, that's what I thought too! I used to use Avast. But I checked and apparently I have 0 antivirus programs installed at the moment, and only run on Windows Defender... for which I'm not sure how to whitelist The Sims 4. I'll do some more research on that!
I'll get to this as soon as I have time! Though the only mod I use is an up to date version of UI Cheats Extension so I highly, highly doubt that mod would be causing this, but I understand you need to be sure.
I tried to reproduce this error on a new save. I created Judith a Fiancée and played 2x the Rehearsal Dinne, once from calendar, once from phone. I could still save the game as save as and overwrite save after a week. I played too a wedding event without problems (I only use Windows Defender, and never had an issue with it) // I have all DLC + Kits
Personally Note; I really think they should blacklist fans and paparazzi if you have a wedding event on a wedding venue. The event was awful as celebrity! I don’t recommend it. I hope you figured out why you can’t save your game. Sorry that I don’t could help.
