For problems with the app itself, the fastest route is the app project, linked from the developer official page, where issues are opened in the app repo. App bugs, TV model quirks, and feature requests belong there, because the project team can see the code and the community TV lists.
For corrections to this guide site, such as a step that no longer matches the official page, a broken link, or a keeps list that needs updating, use the contact route on this site and describe the page and the step that is wrong. Clear reports get fixed first, because a guide that drifts from the official page helps nobody.
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