Creating new sims causes error 803

So I downloaded the Sims and played the tutorial household with no issue and even moved 2 new sims into it, but when I bought one of the existing homes nearby and made a new sim to move in, it gives me an error. I get error 803 saying the game failed to load and it rakes me to the world selection screen. From here, I cannot even go to the original household, it will just load perpetually. I have also tried buying a different house and making different sims, but the error still occurs. I can play as these new sims only if I'm already playing the original househould and invite them over. I have no mods or cheats enabled, just the base game. Is there any way to fix this?