sims 4 household wont load but other households are loading in the same save

i have 4 played households in one save file and in the same world three of the households are playing and loading just fine but one gives me an error and says restart the game. i tried moving this family out of the world and into other houses but it won't load. i can go into build mode and cas from the manage world screen. i can also visit the family with other households.this started a couple days ago, i had been playing this household and then saved and played another house for a few minutes and when i went back to the original household it wouldn't load

Try running your game without any CC and mods. Go to "Documents\Electronic Arts" and rename "The Sims 4" to "The Sims 4_". The game will re-create this folder so if you want to get your saves, mods and CC back just delete "The Sims 4" and rename "The Sims 4_" to "The Sims 4".

If that solves your problem it means some mods or CC are breaking your game. SimsVIP has a list of broken/updated mods, Sims 4 Studio can fix most of CC.

If removing mods and CC doesn't help, delete "Game" folder from your Sims 4 installation directory and download fresh one from here.

If nothing above helps try this and post the result here.