I get this for both Magic Buckets and Xert Dashboard BETA. Other data fields I can install no problem. It is a completely new Garmin Edge 540. I have upgraded firmware to what seems to be the latest version (24.56). Garmin says no updates available.
Any suggestions? Miss my Buckets (had them installed on my old Garmin Edge 530).
If for some reason it’s not updating when you run Garmin Express, you could try a factory reset of the 840 then connect to Garmin Express and try the update again.