How to activate Myvolumio on devices

Hello everyone.
I’ve logged in MyVolumio after making account.
However I don’t know how to activate MyVolumio on devices since nothing is seen in the list.
Should I download a different volumio img file? I’ve searched. But I couldn’t find.
Maybe MyVolumio seem to not know which devices I use. How can I inform this?
Currently I’ve been using a volumio 2.55 from Raspberry 3B+ device.
Need a help!!

Warner

It seems Volumio image problem.
Current device image which is provided by Aoide player’s company doen’t seem to support MyVolumio login.

only image provided here are supported. If you download from elsewhere, see with the provider.