error code 30 when trying to save

For the past two or three days, I've been unable to save my game. At first I was getting error code 34, and I thought I fixed it because after getting rid of CC that I thought might've been the issue and clearing my cache, my game went back to normal. But today, I was working on a new house, went to save, and got error code 30. There was only one piece of CC in the house at the moment, so I removed it from the house and tried both saving the game and saving my lot to my library, but I got the error code again, and the lot won't save to my library, so I can't even just move it temporarily to the library, exit the game, and try to fix the issue. I'm just confused and concerned, since this is a family I have been playing and working on since 2019, and am afraid something is wrong.