Help & troubleshooting for channels on your Roku device, including adding/removing channels, logging in to, authenticating, or activating a channel, channel-specific playback issues, assistance contacting channel publishers to report issues, and adjusting channel-specific settings.
I just tried it on my Ultra and it's working fine. I had to do a system restart when my Pluto app quit working maybe try that. Maybe try uninstalling and reinstalling. Another option is the STIRR app which has Comet channel on it.
This is the normal break message. Just wait a few minutes for the regular "over the air" commercials to stop playing for the antenna customers, and this message will go away as the streaming broadcast continues back to normal in sync with the antenna broadcast when the regular commercials are over.