I’ve snipped their process under the cut. Thank you to the person on the sims forum who figured it out. This was caused by the Nadeau household, not sure why, but they’ve been deleted from the two sim saves and on my end this seems to have fixed the problem. This error was causing the game to kick you out and to the world menu when trying to enter build mode. This is an update to my save file in which a build mode error has been fixed. Bekindtoyourself-darling’s ‘just make it better’ save file V.2.1 - Patch Update - Build Mode Error Fix!