Forum Discussion
Ravingbantha Have you cleared the EA App's cache and/or uninstalled and reinstalled it since you unlinked and relinked your Steam and EA Accounts? If not, please do that now. You shouldn't need to reinstall Sims 4; at most, a repair (Steam > Sims 4 > Properties > Installed Files > Verify integrity of game files) should be sufficient, but you can of course reinstall the game if you want.
If you do reinstall Sims 4, I'd suggest doing a clean uninstall, as described here:
📓[GUIDE] [PC] How to Clean-uninstall Sims 4 | EA Forums - 12636503
But before going through all that effort, try running both Steam and the EA App as an admin: right-click each desktop shortcut and select "Run as administrator." Make sure both have loaded fully before you try to open Sims 4.