Berkeley CA audiophile is desperate need of help

Have you tried the DAC with other digital sources, such as a CD player?  If so, and it seems to work, then your problem is either: 1) Internet; 2) The server; 3) the hand off from server to DAC.

  Servers are networking computers that are gussied up to look like audio components.  They are subject to the same foibles that computers are.  Have you ever had a computer that was working fine and suddenly doesn’t “see” something, such as a printer?  The first step is to power everything down and then restart them.  If that doesn’t work after a few tries, then it may be that a software update in the server, or the DAC, may have “bricked” these two components 

Ime, most every problem with streaming I in the network.. Fwiw I just did get my streamer dad working consistently this past weekend after 6-8 month of problem after problem. I knew it was network related but I am weak on network issues. But I learned a lot over the weekend.

The problem for me was that i had not turned on the media streaming setting in Windows 10. 

What model is the DAC? Overall, it's far more likely to be on the internet/Innuos side of things.

This is precisely why I predominantly only use physical media...lp, cd, cassette, mini disc, 8 track, etc...I don't need the hassle of today's technology...jmo

If your TV is at all recent it probably has a digital audio output.  Try that.  Make sure you set the TV to output stereo only.