Hi, @SmilingSam
Greetings, and welcome to the Roku Community.
We see that you're having an app playback issue with the Rugby Network Channel, and we'd like to assist you with this. It seems like you've gone through some basics, and we'd like to add some troubleshooting provided by our support page here on how to resolve channel playback issues.
If the problem persists, we would recommend contacting the channel support team for additional assistance.
All the best,
Kash
Takashi O.
Roku Community Moderator