This question has been asked before, but my issue is specifically with Xcode 11 and UISceneConfiguration. Before Xcode 11, when you deleted a storyboard (Main.storyboard) from your target, then added a new one (AnotherStoryboard.storyboard), you would have to update Targets > General > Deployment Info > Main Interface to use your newly added storyboard. In Xcode 11, this is not sufficient and the app will throw an exception
*** Terminating app due to uncaught exception …