Help ! Synology / Minimserver / Ministreamer / Bubble / Lumin app / Chromecast Audio

[Cebolla]

Volumio and any other audio file streaming distro that uses the upmpdcli upnp front end client for the internal MPD audio file player they use (eg Moode Audio & RuneAudio), would still require the BubbleUPnP Server software to provide Qobuz access. For the Raspberry Pi, openhome.org's own OpenHome Player might be the better option, as it'll provide native Qobuz access via OpenHome Streaming Services:
OpenHome Player for Raspberry Pi

In any case, it might be best for the OP to at least check that the Lumin app isn't still caching the old links to the relevant audio files, as was suggested, before giving up on the Chromecast Audio and/or the BubbleUPnP Server software!