Route from Alltrails

I made a route on Alltrails and I downloaded it as a Garmin Fit (Ant+).  But when I copy it on my watch (Fenix 5x) I can only see the name and not the route itself.  Also the distance indicated in the list is 0,0km.  Anyone has   How can I put this on my watch without having to use GarminConnect?  Uploading a GPX or TCX to GarminConnect  puts the 1st km in the wrong place witch causes the waypoints to be on the wrong place.