Same here. Tried all what you tried. Connected to Tunein radio, my internet connection is OK and I am able to find my regular library. But not Tidal.

Just hoping it is an issue with Tidal and its connectivity to Sooloos and Roon rather than something else.
I have always been afraid of the time when Tidal will not be able to connect with Sooloos due to lack of compatibility.

axe