Hi there Hiroshi - a warm welcome to you.
Now let's try to work this out ...
DNSServiceBrowse() failed (-65563)
In itself this is logic to me because the Minimized OS shuts off all it can but leaves sufficient for Audio Playback, including various settable means for network connections.
BUT
Regarding the latter, this is implemented as "one way", meaning : if the Audio PC is able to detect for example the server by means of an IP Address then this is sufficient to operate for the Audio Part of it all (running on the Audio PC (the PC producing the sound)). This, again for example, does not mean that the Server can find the Audio PC, as there is no reasion for that (regarding Audio Playback).
All it tells is that as much as possible has been shut down, while normal playback still operates.
Please keep in mind that the above is only exemplatory for the process (of shutting off things) in general. Now :
First off in Settings, the Services and OSD section, there's some sorts of offered "shut offs" and "keeps". It doesn't require much imagination to see which does what, as long as you know that you should start with the "maximum allowed" possible. Watch out : this is to be set while in Normal OS Mode. Read : Change those settings while in MinOS Mode does nothing. It changes the settings, but they are applied only when you're in Normal OS and then boot into MinOS again. To avoid confusion it is best to change those settings in Normal OS only.
Also (for confusion indeed) : when something is not shut off in Normal OS, it can still be shut off in Minimized OS and then it is dynamically applied when Unattended Playback in XXHighEnd is started. This is not of your interest though (but it explains why these settings can still be changed while in MinOS).
I will try to summ up the "most allowed" settings for that section; Activate (make Red) :
Stop Desktop Services;
Stop Remaining services (required to boot into MinOS in the first place);
Keep LAN Services;
Persist;
Keep PAN Services;
Keep WiFi Direct Services;
Use Remote Desktop.
(all others are to remain inactive (Blue))
Now a maximum remains alavilable, while the difference is about networking, mostly.
Remember, apply this in Normal OS and after that boot into MinOS again.
If now your application still does not work, it looks like to be about a DNS service indeed (as the error message implies) of which it is known to be off anyway. This means that :
You should, where possible, use IP Addresses instead of Computer Names. This should be done at the Server Side for sure, but I would do it on the client side (the Audio PC where the MinOS is applied) the same.
FYI also look here, which IMO is about the same :
https://godoc.org/github.com/andrewtj/dnssdIn there look for the -65563 error number; you will see that indeed this is about a Service not running.
I give you this list because when you solved one issue a next may pop up.
Now assumed you can solve this by means of the above settings, you obviouslly are going to "tear down";
Boot into Normal OS again, switch some more off, go back into MinOS and retry; In the end you'll be having the leanest situation that works for you. Also, let me know about the settings which did it for you, so I possibly can make that setting more lean for your (and such) situation(s).
If it does not work, it is going to be a bit more difficult;
In that Services and OSD section you also see the "Keep tis Service" larger textbox. Now if you know or feel what Service it could be what needs to keep on running (look for services with "DNS" in their name could be an approach) then you can fill them in this textbox, again while in Normal OS; try in MinOS as usual.
This is NOT really something for a normal end user, but anyway it is possible.
Assumed you have the Tooltips active (field almost at the bottom in Settings), you'll find some info on how to use on them. Notice you can view the ToolTip more conveniently under the [ H ] button in the top of the screen.
Please be warned that when a new Windows version comes about, I myself can easily be working on this for two days in a row, before I find the "minimized" consistent whole. And this is with spades of experience.
So I hope you can let it work by means of changing the "rough" settings as explained.
Om a side note : When you have this all working, you obviously will boot into the RAM version of it. But, do not change such settings in there as it will not work out with the rebooting into Normal OS vs MinOS (the settings you imply here are NOT saved in the BASE version at any time).
I hope it clear !!
Best regards,
Peter