I recently changed my TIDAL password, from the Tidal web interface. The next time I used Roon–I think it was the next time, although I’m not 100% sure–I got the “not signed in to TIDAL” message. When I tried to sign in, using my current credentials (including my new password), the log-in failed. I tried several times–no success. So then I went to my TIDAL app, signed myself out, then signed myself back in again with the same credentials. Worked fine. So I tried again. Restarted Roon. Tried signing in to TIDAL through Roon several more times. No luck.
No, not sorted. And just to be sure I didn’t do something dumb, I went and did it again: Signed out of Tidal via the web interface, signed back in with usual username/new password–no problem. Tried it again in Roon; no dice.