Qobuz is rolling out a change to their login procedure across the regions offering the service. Take a look at this post for the details and what you can do:
We’ve gotten some reports lately about Qobuz integration issues in Roon.
In taking a close look at affected accounts we’ve recognized a pattern. In many cases, the affected customer has synced their Qobuz account in Roon using their username instead of their email address. Qobuz has recently changed its policy and now requires customers to use their account email when using partner services - such as Roon.
Qobuz mentioned this in a recent subscriber email sent out on June 17th, see screenshot …