I have the same problem. I have just installed the update and now I can't play at all, the launcher wouldn't start. I have The Sims 3, The Sims 3: Late Night, The Sims 3: Showtime, The Sims 3: Seasons, The Sims 3: University Life on CD. I bought the rest of expansion packs via EA. The Sims 3 I had to change the key because the game didn't work. Do I really need to uninstall the game? I feel sorry for all the saves of the game.
@Patka4422 You may not need to uninstall the game, and if you do, you can preserve your saves. They're in Documents > Electronic Arts > The Sims 3 > Saves; you can simply copy this folder elsewhere. The saves shouldn't be deleted when you uninstall the game, but it's always good to have backups.
For the issue itself, please run a dxdiag and attach it to a reply here.
https://help.ea.com/en/help/pc/how-to-gather-dxdiag-information/
