The problem is you are using a route, not a track in your GPX file, so SMP backend fails with there being “no track available”, basically.
There are online tools (GPSBabel or something?) that can convert between routes and tracks
The problem is you are using a route, not a track in your GPX file, so SMP backend fails with there being “no track available”, basically.
There are online tools (GPSBabel or something?) that can convert between routes and tracks