This happens when your trip is not uploaded to the server correctly. To fix it:
On Android
Open the Geotag Photos Pro on your phone > open the menu > select "GeotagPhotos.net" under "Services and accounts" and press "Reupload"
Open the Geotag Photos Pro on your phone > open the menu > select "GeotagPhotos.net" under "Services and accounts" and press "Reupload"
On iOS
Open the Geotag Photos Pro on your phone, go to Settings > geotagphotos.net, then select "Upload old d
Open the Geotag Photos Pro on your phone, go to Settings > geotagphotos.net, then select "Upload old d