Hi @Lou_Oddo,
This could very well be the source of your issue. Below are a few things to test out for a solution:
Please follow the steps in Adding Application Exception to McAfee Firewall to add Roon as an exception to the firewall.
Additionally, you can try changing the router’s listing to a Home network in McAfee: Mcafee Firewall settings for Roon 1.7 - #7 by Anthony_Lombardo
A third solution is to change the security level of Roon and RAATServer: SB3 won't connect to Roon Sever with McAFee turned on - #9 by Jeff_Barham