I think, Sequoia doesn't recognize the GPX-Files.
If you add this file into your project scheme manually, it works.
Just put the file name into the file:
.xcsheme:
and it will work. The .gpx musst be in your Xcode project, of course.
If you don't know at which place in the .xcsceme file it hast to be put, you can put in Xcode some standard location (for example Honolulu), exit Xcode and replace "Honolulu"- sequence with the sequence above in the .xcscheme file.
Best
DM
drMacOS
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