There has been a big change in the track importer.
It has many options!
For A Single track import
You have to have imported sweepers.
To connect sweepers to a track!
Cover import.
Note the settings:
Path/URL. (like: https://www.radiostore.co.uk/ for to check if the path is correct!
Category.
Subcategory.
Genre.
Track Type. (Most important for track from internet,
Or importing radio shows .)