Do you have any Mods or CC? If so move your Mods folder to the Desktop and delete localthumbcache.package. Then test the game.
If it works now check for updates to your Mods and CC. Add it back a little at a time while testing until you have found all that are broken.
I have no Mods or CC. All that had happened recently was updating my game and installing a few expansion packs and game packs that I bought. Got on game today and it's still showing nothing but a night sky in Create a Sim.
@weeniebeanie26 Please try repairing the game: open your Origin library, right-click on the Sims 4 icon, and select Repair.
