[CURRENT ISSUE] Sims 4 Unable to Start, Game Data Missing or Damaged

It always launched perfectly from the Origin app. I took a very long break from playing and came back to it this week, and it simply won't work on the new app. 

I have zero mods or cc. I have tried so many solutions. Uninstalling, reinstalling, app updates, app recovery, repairing the game files, closing the EA background task.....I have no idea how to play the game (and packs) that I've paid for. 

Is there a solution that anyone can point me toward?