I have the same problem only on Asus VivoPC. I didn’t start the computer for some time and today the same message and no possibility of playback. I tried everything and nothing. When connecting to Volumio via PC I see all the files. I join the request for help.
Pretty sure your VivoPC doesn’t has issues with a Hifiberry DAC, besides that it can’t be connected…
The thing is that on my mini PC I got a similar message. I can’t play anything. "Error
Failed to open “alsa”(alsa)
Failed to open ALSA device “volumio” No such device
I’ve been using Volumio for half a year and I haven’t had this problem.
I restored factory settings and it was fine for a while and then the same error again.
update to the latest version V3.742
Try it