I received an email from Audirvana Support:
You have previously contacted us regarding a connection problem with Tidal in Audirvana. We recently did an update of Audirvana, Audirvana 3.5.41, which will allow us to better understand where the source of this problem is, have you done the last update? Is the Tidal disconnection problem still present in your system? If so, please do not hesitate to contact us again with the operating system you are using so that we can give you the procedure to find this information and send it to us.
I am using the latest version, and I am getting TIDAL errors. I am using a different PC than when I first logged TIDAL errors a few months back.
I have quite a few errors that look like this:
2020-10-25 17:40:18,851  DEBUG Audirvana.App - Tidal getTrackFileUrl error: 401
… followed by this error:
2020-10-25 17:45:59,201  DEBUG Audirvana.App - Unable to stop audio client: -2004287487
I am running a pretty-much brand new (2 weeks old) Windows 10 PC, with an Intel i9-10850K processor, 32Gb RAM, and a Samsung EVO 970 Plus NVMe M.2 SSD. Connected to the internet via ethernet cable, and was playing an online game at the time (the internet never disconnected).