@SwaggyPerson123
I tested your save game and it looks like something about the household that owns the restaurant is bugging out the list.
The game throws a LE (see attachment).
I was able to buy restaurant and get employees with other households, same as you.
Now, I did find a workaround how you can get your current household to work too but I tested this on a completely vanilla game so if you go back to your modded game, it might not work. I get that you maybe don't want to loose your clothing and all so I would first try this on the version with all your cc (do make sure you update mods) and see if it still works. Do keep a backup.
- Sell all your restaurants
- Now load your household in the apartment lot and move all your household inventory items to the lot (there are two, a urn and food). If you don't do this, you will loose both.
- Optional: Move out of your apartment
- Now go to the household manager and click on the household. Choose Transfer Sims between households.
- Create a new household and move all four members to the new household. (This will have some downside to collections if you no longer have the items in your inventory I believe as you are creating a new base household this way (not verified though))
- If you have not moved out before, the game will ask you if you want to sell all your furniture or keep. Sell it so it's still in the apartment.
- Move your new family back into the apartment.
- Re-buy the restaurant.
- You should now be able to have employees again