I'm not able to load in the household.

I'm having this issue from few days but i ignored it because it worked for me but this time when i tried to load in a household it just doesn't let me. So i'm playing with a household and when i tried to send my sims to university housing it showed me the error but after loading into my original household and then going into managing world and selecting diff household it worked. But this time when i tried to split a sim from my household and build them a house it just doesn't let me. i tried loading in my original household and then going to managing world to select diff household hoping that it will work like it did previously but it didn't. I'm stuck because of this error. I read somewhere that it is because of the corrupt save file so i need help with this. Link to my save file