What can this player render?

What you may be seeing

• A board works in the browser preview but one platform cannot render one or more elements the same way.
• A Roku screen hides or substitutes an unsupported widget/content type.

What usually causes it

• Browser and Raspberry Pi use the browser renderer and therefore have the highest feature fidelity.
• Roku is a real native SceneGraph/BrightScript player using a server-compiled Relay Plan, not a general-purpose WebView.
• Some live widgets have native-data, snapshot, marquee, local, or unsupported Roku strategies defined by the widget registry.
• Arbitrary web embeds and YouTube-style web content cannot be assumed to work on the native Roku renderer.

Do this

1. Check the Widgets & player compatibility reference in Docs; Roku widget support is generated from the same registry used by the Relay compiler.
2. For browser-only elements, replace them with supported uploaded media, native/snapshot widgets, or use a browser/Raspberry Pi player for that screen.
3. Do not re-pair a healthy screen to fix unsupported content. Pairing changes identity; it does not add renderer capabilities.
4. After replacing unsupported content, publish a new release and confirm the affected screen becomes active on it.

You know it is fixed when

• The board contains only elements supported by the target player, or an intentional fallback is documented.
• The physical screen renders the new published release without hidden/unsupported primitives.