I'm using the app Map My Drive on my iPhone to track routes in real-time. This app generates GPX files. When I try to import a GPX file generated by Map My Drive into BaseCamp, I get an error message stating, "Unknown error opening import file." Other apps and sites that import GPX files, e.g. https://gpx-viewer.com/, are able to read the GPX files generated by this app.
I'm using BaseCamp 4.7.2 on Windows 10.