I have been running Plex server on an iMac for over 2 years and since last year have been using Apple TV 4. For the last week to 10 days it fails to find the Plex server. I can sign in using the Plex link but it fails to find the server on the network. Plex still works fine via my mobile, tablet and smart TV app.
Has there been an upgrade or something to the Apple TV app? I haven't changed anything within my environment. I have checked that the firewall on the iMac is not enabled.
Can you help please?