Please add the details of your network hardware and setup to your support request. And how is the Denon connected in Roon? Are you using an HDMI connection, or a network connection (wired or wifi) using Airplay?
Full information makes diagnosis easier. Thank you.
So the Roon Core is on a MacBook Air, and this is connected via wifi to the internet? And you use the HDMI connection on the MacBook to connect to the Denon?
Roon Labs strongly advise that a Roon Core have a wired connection to your network.
However, you are saying that you are getting errors even with your local files - and these are on the MacBook’s harddisk?
And when you say Tidal files are OK - you mean playing Tidal files via Roon?
Please can you confirm the above points to give some more information about your issue. Thanks.