I'm seeing this same crash on macOS. @testinstadev did you find a solution?

This code doesn't work for me - it presents the Files browser and then immediately dismisses, just like my original issue. Can you share more info about your configuration - e.g. how you defined "myArchive" in Info.plist and the code where you extend UTType?

This does not work for me on iOS 16 - I get the same result where the Files modal immediately dismisses. Can you share more about your configuration, e.g. where you define ".myArchive" and the details in Info.plist?