Hi, Kirsten!
Is there any results of diagnostics?
There were numerous problems over the weekend with Tidal in Roon: skipping tracks, slow loading pages (any Tidal tabs - frequent message “Error loading page, Please check your network connection, Reload Page”), lost authorization.
Qobuz in Roon at the same time worked fine. Tidal itself outside Roon too.
I did Logout / Login manually and reboot ROCK a few times, tried different DNS (Google, Cloudflare, ISP). All without success. 
Any ideas?