VAST-2.0-creativeextensions-unknown-child
<CreativeExtensions> may only contain <CreativeExtension> elements
ErrorSchemaIAB VAST 2.0 §2VAST 2.0 and later (all versions)
`<CreativeExtensions>` is a container for `<CreativeExtension>` elements only.
How to fix
Wrap the element inside <CreativeExtension type="custom"> in <CreativeExtensions>.
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