VAST-2.0-creatives-unknown-child
<Creatives> may only contain <Creative> elements
ErrorSchemaIAB VAST 2.0 §2.3VAST 2.0 and later (all versions)
`<Creatives>` is a container element that may only contain `<Creative>` children.
How to fix
Replace the non-<Creative> element with a proper <Creative> wrapper, or remove it entirely.
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