just tried and couldn't log in...I've been logging in successfully on this machine for 6 years
The same happened with my Oppo app I used for my 105 /Tidal streaming. Oppo customer service said it was something on Tidals part, not theirs, and there was nothing to do about it, but as @soix pointed out, the M Connect app is now working just fine as an interface.
I have both a Wiim Mini ($99) and Pro ($149) streamers and both work great. (I also have several Raspberry Pis and Quadra Inovatos that I use as streamers.) The Wiims are among the easiest to set-up computer-type devices I've ever had, and support a broad range of streaming services. (I use mine with Qobuz and my local collection.) The only caution is that the Mini only has optical out (though it does support 24/192K) while the Pro has both optical and coax. Neither has USB out. In short, a great way to add streaming service playback to your system at a very reasonable price.
As Oppo has suggested, using a different app like Mconnect may be a possible solution. Mconnect is a third-party app that can be used to stream Tidal to your Sonica streamer. You will need to download the Mconnect app onto a mobile device and connect it to your Sonica streamer. From there, you should be able to access Tidal and stream music to your Sonica.