Can’t save/deletion of objects after leaving and returning to lot/mailbox glitch

I have been struggling with not being able to save and getting the error code 00. It has been a couple months where if I play I know I can’t play with those sims again. Also whenever I leave the lot and come back things that I buy from build/buy mode disappears. Lastly mailbox glitched and after putting a new one on the lot the base game one showed up inside the house so I had two mailboxes