Can you please share a screenshot of your Roon Settings -> Audio tab? You can use these instructions to upload screenshots to this website. Is there any change if you plug in the M10 via Ethernet to the router?
I would first try to disable any firewall software enabled on your Roon Core.
Be sure to check the built-in Windows Firewall settings as well as any antivirus software installed on your PC, antivirus apps often include firewall functionality these days.
Just to add on to what @john mentioned before, I would add both Roon.exe and RAATServer.exe to your Windows Firewall and any Antivirus firewalls you may have as this does appear to be a firewall issue somewhere along the line.
These two executables can be found by navigating to your Database Location/Application folder path and you can use these instructions to add the executables to your Windows Firewall.