Please see:
On March 6, 2024 Roon released version 2.0.30 which included build 1382 of Roon Server. In the day following the release our support team received reports of connectivity issues from a very small subset of the Roon user community. Upon investigation it was discovered that a small, maintenance-focused change in Roon was resulting in some devices being unable to establish a connection with Roon’s cloud services as well as the cloud services of our streaming partners (TIDAL, Qobuz, and KKBOX). Due …
Another user reported that there is a fixed firmware available from Rockna, so maybe check and run a firmware update on your server may fix your issue.