Hi, Terrynpeg.
Thanks for posting here in the Roku Community!
We understand how frustrating it can be when trying to stream on a channel but having a playback issue. We get it and want to help you sort this out.
If you have already canceled your subscription to the app, try the steps below and see if that resolves the issue:
- Remove the channel: Highlight the channel tile on your home screen and press Star to open the Options menu. Select Remove channel and confirm.
- Restart your Roku device: Go to Settings > System > Power > System restart > Restart Now.
- Re-install the channel: After your Roku device restarts, visit the Roku Streaming Store and add the channel again.
If the app playback issue persists, you may refer your concern directly to Great Courses App Plus support for further assistance.
You may also visit this support article: Issues playing content on your Roku device.
We are hoping that everything will be sorted out for you soon.
Best of luck,
Emman