This is happened with me too. Recently I downloaded the latest patch for TS4 University (patch of this week, 1.58.69) and when I started to play with my two students that I created to study in Britechester suddenly both of them disappeared, it's as if Thanos had snapped the Infinity Gauntlet and purged them of my game (LoL). Never of this happened with me, it's my first time. I use mods (MC Comand Center, Adult Mod, UI Extra Cheats, LittlemsSam's mods, Sacrificial Mods and others). I was wondering what happened! I'm very worried about this, I already tried to restore my Save but the family is still empty with the game trying to reload it. I didn't update my mods after this patch because I thought it wasn't necessary yet. I'll try to delete my Electronic Arts folder and try to load my saves without mods to see what happens.
A fix for this, we'll not a fix but an alternative is to be a paranoid saver and always save your families and lots to the gallery. That way if your save file screws up and u lose your families all your households/lots will still be there.
