RTBlintAlpha
AdCOM Asset has no title, image, video, data, or link subtype
A native Asset object has none of the subtype objects AdCOM requires.
What it means
An AdCOM Asset is one piece of a native ad. The spec marks title, image, video, data, and link as required-star: at least one subtype has to say what this asset is.
Why it matters
A native asset with only an id cannot be rendered. The publisher does not know whether to draw a title, an image, or a link.
How to fix it
Add a title, image, video, data, or link object on the Asset.
Example that trips it
{ "id": 1 }An Asset with only an id. Nested under ad.display.native.asset in a full 3.0 response.
Check your payload
Paste a bid request or response into the tester to see whether this code fires against it, or gate on the id in CI with the CLI: the id is stable, wording is not.
Back to the full diagnostic code reference.