Re: Sims 4 white screen

@simmer15x  Please also delete localthumbcache.package.  If that doesn't help, move the entire Sims 4 folder out of Documents\Electronic Arts and onto your desktop, then try again.  Your saves and other content will be intact in the folder you've moved but temporarily not read by the game; you can worry about that after things are working properly.

If you still get a white screen, please run a dxdiag and attach it to a post.

https://help.ea.com/en/help/pc/how-to-gather-dxdiag-information/