Re: “Application not found”

@Carizzle143  The file in your first screenshot is a component of the EA App, so please uninstall the App with Revo Uninstaller (the free version is fine) and reinstall it.  If Revo can't find the EA App, download a fresh copy of the App installer and run it.  If you're asked to repair an existing install, choose that.  Then if you get the same original error, remove the App with Revo and reinstall.

Once the App is installed again, run it as an admin: right-click its desktop shortcut and select "Run as administrator."  Don't try to launch Sims 4 until the App is fully loaded.