Sims 4 Keeps Saying Update Required How To Fix
How to fix Sims 4 not starting because of update required
One or more of these may solve the issue of Sims 4 not playing because an update is required. Many users report clearing their cache or running a repair on Sims 4 works, but this may not always be the case. Contact EA or Sims 4 support for further solutions if you continue to encounter the issue. With luck, one of the above solutions should fix the problem, but EA may be able to provide you with additional help and fix the problem for good.
Clear your Cache for Sims 4 Repair Sims 4 Run EA App as Administrator Uninstall and reinstall Sims 4 Uninstall and reinstall EA App
For more information on Sims 4, check out How to play Sims 4 offline and Can you play The Sims 4 on Mac? on Pro Game Guides.