Sims 4 Error - Unable to start

Suddenly I am not able to load my game. The below message occured and so far noting I do will start it:

Unable to start

Cannot start because required game data is missing or damaged. Please try reinstalling game. 

(85262c58:29f00e76:00000000)

The problem is - I am not sure how to reinstall the game in origin. It keeps telling me that the code is used and I do not see another option available? 

Please assist.

Thank you!