Emby Client app on my TV won

I just loaded the Emby Media Server on my Mac Mini M4 at Version 15.3.2. The MS runs fine, love the software. But when I load the Client App on my Roku TV and start it I get the "Can't connect to Server" message. The thing is with no intervention on my part, Plex Media Server has always run fine, Server and Client. Plex is doing something in the setup to make it run. When I run "Canyouseeme.org" to get an ip address on my mini, it also fails to connect to my "Local Host" address. So some setting on my Mini is stopping the access, I turned off the Firewall. Are there any other settings on the Mini I need to adjust that Plex adjusts automatically to allow Emby to work?