Roon not recognizing core

Hi @Rudy_Taylor,

So we can better assist you, please provide a brief description of your current setup using this link as a guide.

Make sure to describe your network configuration/topology, including any networking hardware currently in use, so we can have a clear understanding of how your devices are communicating.

Can you elaborate a bit on this? Did you restore from a Time Machine backup? Was Roon restored as a part of that backup or did you install it new?

As Andrew suggested above, definitely try disabling any active antivirus and firewall and see if that yields any change here.