Hi @Lancasterbob,
Welcome to the Roku Community!
Thanks for letting us know about the trouble you've experienced with the UI-800-3 error on the Netflix channel and the steps you took to fix the problem.
Kindly follow these instructions to resolve this issue:
- Remove the Netflix channel from your Roku device.
- Restart your Roku player. You can do this by navigating to Settings > System > Power > System restart > Restart.
- Re-add the Netflix channel to your Roku device.
For more detailed information, visit our Support article about how to resolve a channel playback issue.
Please keep us posted, and we'll continue assisting you from there.
All the best,
chel
Jecheal R.
Roku Community Moderator