I'm on 10.14.5 Mojave and have non-beta Xcode 10.2.1 installed.After I downloaded the xip file from my dev account and unzipped it, I tried running the "Xcode-beta".All that happened was a dialog box popped up saying "Required content for platform iOS Simulator is missing. Please reinstall Xcode" I tried moving it to my Applications folder, but this didnt help either.Any suggestions?In my Xcode 10.2.1 I can run the simulator.Thank you!