I’m getting error whenever I’m in build mode

Hi, new player here 🥲 Since the last update I couldn’t decide if I should update or not. I’m currently using sims 4 in offline mode and I can make characters and I can’t seem to build anything! I’m trying to change the high school lot but it gives me error and I also can’t put any residential lots from gallery to my game either. Should I just update the game??? I’m afraid cause everyone seems to be saying their mod and cc doesn’t work and they had to delete. Idk what to do, please help!!