Are you able to link up and view the Science Channel from their web page?
https://www.sciencechannel.com/
It plays on the TV with the Direct TV app and I can play it on he webpage. I just can't play it in Channels.
Have you ever updated to the prelease?
I have no issues watching Science channel thru Directv or DirectvStream in Channels!!!
What does your Channels log say when you try to tune to Science Channel? Check your client source (not your dvr server) to make sure you haven't blocked it on the client.
Settings > Manage Sources > Directv (or Directv Stream)
Make sure you have a heart and not a 
I updated to pre-release Version 2025.11.19.1617 yesterday.
Win 11.
All good, Science etc
Try playing it in the Channels DVR web UI player from the guide.
Then post what errors show in the Channels DVR log.
Sorry guys, been busy for the last day and couldn't restart yesterday due to important recordings. It appears it updated itself sometime yesterday afternoon about 11 hours ago and now it is working and I have the Science Channel once again.
Thanks to all.