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

Do you have mods or CC in your Mods folder? If so, please do a "vanilla" test:  Drag the Mods folder to the desktop and rename it, delete the file called localthumbcache, open the game to test, and exit without saving. This will let you know if a mod or CC item is your cause. If it is, see Mod & CC Issues: START HERE