About two months ago Tidal changed their login authentication resulting in it no longer working on my A+K DAP players (and other brands I suspect). A+K have finally released a firmware update to fix the issue, for the newer players anyway. My older Kann is not going to be updateable apparently but my Kann Alpha now works fine.
Not hugely impressive by Tidal or A+K to be honest.
Well a significant part of my DAPs functionality stopped working without warning for several months. I think it is reasonable to be a bit miffed about being unable to access a major source of the music I play, and that i pay for on subscription.
Tidal and A+K are not small companies in these markets. I think they should have done better.