No playback via Tidal Connect

Hi,
on both my RPi3B+ and my Allo USBridge Signature Player (I’m not trying both at the same time, this is just to show that it seems device independent), I observe the following behavior:

  1. Fresh install of Volumio from downloaded .img
  2. Integration in home network
  3. Login to myvolumio, activation of device
  4. Tidal (directly on Volumio) works fine after login
  5. Tidal Connect, however, does not. When I initiate the connect from the iOS Tidal app, Volumio shows a notification about a new connection. However, hitting play on the iOS app yields… nothing.

Help please?