Can you please look over this guide and let me know if it helps?
Since you are using a Windows PC, I would verify that both Roon.exe and RAATServer.exe have been added as exceptions to your Windows firewall.
You can use these instructions to add the exceptions and the executables themselves would be located in your Database Location/Application folder path.
I would also add these exceptions to any Antivirus or other Firewall blocking applications you may have and ensure that you connected to your network via a Private network, not a Public one, see this guide for more information.
Yes the shares are setup correctly as per the document.
I don’t understand the instructions re: the firewall however as no Roon files sit on the Windows PC (NUC) only music library files (that I am trying to access via Roon on my iMac)
FYI - I was able to connect perfectly to the NUC share via Sonos also. It’s just Roon that refuses to connect.
This did not work either but thanks for the suggestion.
I have not managed to figure it out still, so I took the decision to move the files directly to the NUC. I had been considering that anyway.
So I guess you could say the problem has been ‘worked around’