Playlists in Qobuz plugin

I installed the plugin on my Vortexbox / LMS server which I control via Orangesqueeze on an Android tablet.
Works fine, but how do I create a playlist ?
I can see the option when I am playing a track, press it to ‘Save to playlist’ and then - nothing.
Where am I going wrong ?
I am only using the Qobuz free trial at present. Is this facility disabled in the trial version.
Help !