Specific save crashes when trying to switch families

Could you please provide the following information

-  Are you using mods/cc in your game ? Please remove them and test without them if you do.
-  What platform are you playing ?

PC

it crashes without mods as well

To be sure, your game is crashing to the desktop or just endless loading ?

it's crashing to the desktop

Sounds like a potentially corrupted save.

Would you be willing to share your save with me ?

If so, please zip your saves folder and upload it somewhere like dropbox, googledrive or OneDrive and PM me the link.