Missing Data??

I have been trying to launch the Sims 4 every day for the past month, but every time I do, an error message comes up saying, "Unable to Start: Cannot start because game data is missing or damaged. If you have Mods installed, please remove them and try again. If not, please repair or reinstall the game via Origin." I have tried managing the ad-ons, repairing and reinstalling from Steam, and repairing and reinstalling from EA. Nothing has worked, and I do not know what to do.