Post "https://sp.auth.adobe.com/adobe-services/authorize": context deadline exceeded (Client.Timeout exceeded while awaiting headers
Sounds like your TVE provider may be having problems with their auth server.
Fox sports app works. Not home to try on my PC
Could also be internet connectivity issues from the DVR server.
Just got home rebooted server. Some channels like CNN, Animal planet, Syfy work rest don't. Are you saying it's not authorizing?
Re add source
Yes. The Adobe address is the backend authorization server. Many/most networks and operators use Adobe as the backend for authorizing TVE access. The inability to connect that you first mention in the OP makes me think there is a problem with the auth servers.
Seems to be working again. I had robot vacuums running using the 2.4ghz band sent them home. Don't think that had anything to do with it.