I am using a QNAP TS-563 running the latest QTS Version 5.0.0.1858 and installed the Roon Server app V2021-10-03 from the AppCenter.
When the NAS is configured to accept connections via HTTPS with TLS 1.3 only, the web UI for configuring the app will show the error message ‘Could not verify session id’. Only when allowing access with TLS 1.2 and up the web UI will show up.
Last time I checked it didn’t work on TLS1.3. I decided to remove Roon from my QNAP nas in the end and purchase a Nucleus+. Too many weird issues running on the QNAP system, including all those random permission issues with share folders etc.
It seems, the Roon Server web UI is not able to connect to the QNAP to verify its session id. There are several checks in the UI, that have been implemented for security purpose.
I have already looked into this, but could also not establish a connection from the web interface to the QNAP by using the localhost ip (127.0.0.1).
Some applications cannot access the NAS when secure connection and TLS 1.3 are enabled. This is due to a known issue in the applications. We will fix this issue in upcoming app releases.