Windows Firewall is blocking my attempt to allows Docker for Windows to share C: on windows 10 machine.
Works fine when Windows Firewall off. When its on I get
As stated in one other answer Docker doesn't play nice with a VPN. If you're using Nordvpn you have to disable "Invisibility on LAN" and probably "Internet Kill Switch".
If you've done so it should work even with the VPN active.