VAST-2.0-url-empty
URL field is empty
ErrorSecurityIAB VAST 2.0 §2VAST 2.0 and later (all versions)
A URL field (`<Impression>`, `<ClickThrough>`, `<MediaFile>`, etc.) was present but contained no value. An empty URL cannot be fetched or navigated to and will cause that feature to silently fail.
How to fix
Populate the URL field with a valid https:// URL, or remove the empty element.
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