I would reset the connection within Roon. Log out of Qobuz, reboot the system, and log back in from within roon. This should clear most problems. That error is misleading I think. There is probably an authentication issue Qobuz/Roon no longer knows how to handle gracefully.
Are you still seeing issues here? If so, please provide a brief description of your current setup using this link as a guide.
Make sure to describe your network configuration/topology, including any networking hardware currently in use, so we can have a clear understanding of how your devices are communicating.