Qobuz tracks not available in Roon

Roon Core Machine

Pink Faun 2.16
Linux

Networking Gear & Setup Details

Frizbox 7490 - Ethernet cable - Pink Faun

Connected Audio Devices

Roon Remote on Samsung Tablet

Number of Tracks in Library

500

Description of Issue

All Qobuz tracks show “This track not available in Qobuz”.
Qobuz albums show in Roon.
Tidal works fine.
Tidal tracks play outside Roon.
Tried about everything from logging out, restarting everything. Nothing resolves my problem.
Qobuz worked well at the beginning since several years, but has stopped working since several months.
Would be nice to find a reliable solution.
Thanks

Does the Qobuz app itself (mobile app, desktop app or web player) work well for you?

Aside from Roon, Qobuz works well (i.e. Qobuz app on tablet, Qobuz in BluOS) !