"There is a problem with your game setup. Please reinstall your game" error.
- 10 months ago
@keysh23 I doubt Steam is the issue here, but one possible cause of the game not launching is having family sharing enabled. So please check that setting.
If that's not relevant, I'd suggest doing a clean uninstall of Sims 4 and the EA App with Revo Uninstaller (the free version is fine), as described here:
If you don't have any other Steam games installed at the moment, go ahead and uninstall Steam with Revo as well, specifically after uninstalling Sims 4. (The order is important here.) Uninstalling Steam will remove any installed Steam games unless you've changed the default install location. If you do want to try uninstalling Steam but don't want to lose your other installed games, move them to a new directory first:
https://help.steampowered.com/en/faqs/view/4BD4-4528-6B2E-8327
Moving the other games ensures they don't disappear along with Steam itself. Regardless of whether you have any other games, go ahead and create a new Steam library (as described in that link) into which you'll install Sims 4.