TIDAL was working fine previously, and this is a recent change, correct? If so, were there any changes to your setup around this time?
Yesterday was working fine with the old TIDAL account after I change the account from to new account in Roon its error. I can play the same song on TIDAL web with the new account.
I can play TIDAL via KEF Stream app from my iPhone to KEF50W with a new TIDAL account.
Does this error occur for all endpoints? If you play directly to your Mac are you seeing the same thing?
I enable and change endpoint to system output not working. Same error as KEF LS50W.