Well - not everyone wants to use Swift - why no Objective-C implementation? (Well I will have to use nw_browser_t then)

I just ran into the same problem. During early development I have disabled the launch schreen and then wanted to add it back to my project after allowing split screen usage etc. I did this the way Xcode usually would offer it: use the drop down menu to select the LaunchScreen file. But it ends up including the file extension in a "basename" field. Actually it is a bug in Xcode. When selecting the storyboard file, the file extension shall get removed. Obviously this bug already has quite some age.

This issue seems to be related to TabViews, not to SwiftUI or NavigationView. I have seen this in my Xcode debug output in an app written in Objective-C and without Navigation View - except I got "(response-not-possible)" instead of "(null)".