VAST-2.0-nonlinearads-unknown-child
<NonLinearAds> contains an unrecognised child element
ErrorSchemaIAB VAST 2.0 §2.4.3VAST 2.0 and later (all versions)
`<NonLinearAds>` may only contain `<NonLinear>` and `<TrackingEvents>` elements.
How to fix
Remove the unrecognised element — <NonLinearAds> accepts only <NonLinear> and <TrackingEvents>.
Check your VAST tag for
VAST-2.0-nonlinearads-unknown-child and other issues instantly.Validate a tag →Other Schema rules
VAST-2.0-text-only-elementText-only element contains a child elementVAST-2.0-unknown-attributeElement has an attribute not defined in the VAST specVAST-2.0-inline-unknown-child<InLine> contains an unrecognised child elementVAST-2.0-wrapper-unknown-child<Wrapper> contains an unrecognised child elementVAST-2.0-creatives-unknown-child<Creatives> may only contain <Creative> elementsVAST-2.0-creative-unknown-child<Creative> contains an unrecognised child elementVAST-2.0-linear-unknown-child<Linear> contains an unrecognised child elementVAST-2.0-trackingevents-unknown-child<TrackingEvents> may only contain <Tracking> elements