"failed to resolve host ms.cubers.net" on all machines and installs

[raspberrybirdeau]

X-Ray_Dog advices to test Google's public DNS servers: 8.8.8.8 or 8.8.4.4

You can set them in network configuration on your operating system (first do a copy of IP of currently used DNS servers).

I checked, and in my router settings I was using Google's DNS already- with my machines being set to "automatic" (meaning, using Google's DNS as my router is). I decided to manually set the DNS to 8.8.8.8, 8.8.4.4 regardless in case something went wrong in that automatic procedure somehow, but no, same result of the failure to find and use the media server.

So it's not that.