Hi @TheRallycore - When you open a game and click on the household to load, try selecting one of the sims pictures that is not grayed out. When you click on the sim, it should bring up a window that says "At Home" under their name. Click the play button to the right of their name and see if you can load the household that way.
**Edit: It appears that Crinrict and I were answering at the same time. It's always good to have choices 🙂
If that doesn't work, I suggest that you reset your game.
Completely exit the game and Origin
In your documents folder on your PC, rename "The Sims 4" folder to "The Sims 4 Backup". Move this folder to your desktop (or another spot where you can easily find it)
Open Origin. Right-Click The Sims 4 icon & choose "Repair"; wait until the game and all packs have completed the repair. (Origin needs to be online in order to have the option)
Start The Sims 4 from Origin
Check to make sure that there are no "Load Game" options. The game should start completely new with no previous games in it.
Click on the "Play" button and start a new game just to check that it works. Make a random sim and place in a household. You don't have to save this game, just make sure the game works. After checking, you can exit to main menu without saving
Exit the game and Origin
Now you can start putting your files back. After each of these steps, open the game and check to make sure that the game still works correctly before moving on
Copy your save files into the new 'Saves' folder
Copy your Options.ini file to the new 'The Sims 4' folder. (or you can just reset your options in the settings menu)
Copy the files from screenshots to the new 'Screenshots' folder
Copy the files in the Tray folder to the new 'Tray' folder
Finally, copy the Mods files from the backup folder to the new Mods folder. This will put back all your mods and cc, if you have any. Copy each file one at a time and then test the game to make sure it runs correctly before you copy the next one. If you have a lot of mods or cc, use the 50% method to narrow down any problems. Check with the content creator for updated copies on anything that breaks your game