EU Adventure Roads & Trails are not displayed in the map view

[proofresistant]

I have selected the map "EU Adventure Roads & Trails 2026.10" under Settings > Map Display > myMaps.
In this case I have not selected any other maps.

Unfortunately, I can not see any content in the map view
(I have already tried switching on all possible layers)

When I connect the zumo XT2 to the computer, then start BaseCamp and select the “EU Adventure Roads & Trails” from the zumo XT2 device, I see the entire contents of this map.
(It's exciting that there are (could be) so many more small paths available)

What am I doing wrong when using the zumo XT2 device or what could be the problem there?

[proofresistant]

I have now solved the problem myself.

The only thing I didn't try before was the topographic layer.
Now I have also added this topographic layer to the map view.
With the topographic layer you can see even the smallest paths from the “EU Adventure Roads & Trails” map

Perhaps this experience will help others also.