How do I fix VAST-4.0-universaladid-idvalue?

Add `idValue="YOUR_AD_ID"` to ` ` — in VAST 4.0 the identifier is stored as an attribute, not element text.

What does the VAST error " missing required idValue attribute (VAST 4.0)" mean?

In VAST 4.0 specifically, the ad identifier was stored in an `idValue` attribute on ` `. This was changed in 4.1 to use element text content instead.

VAST-4.0-universaladid-idvalue

<UniversalAdId> missing required idValue attribute (VAST 4.0)

ErrorRequired fieldsIAB VAST 4.0 §2.3.4VAST 4.0, 4.1, 4.2, and 4.3

In VAST 4.0 specifically, the ad identifier was stored in an `idValue` attribute on `<UniversalAdId>`. This was changed in 4.1 to use element text content instead.

How to fix

Add idValue="YOUR_AD_ID" to <UniversalAdId> — in VAST 4.0 the identifier is stored as an attribute, not element text.

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Other Required fields rules

VAST-2.0-root-elementRoot element must be <VAST>VAST-2.0-root-version<VAST> must have a version attribute VAST-2.0-root-version-valueVAST version attribute must be a recognised version string VAST-2.0-root-has-ad-or-error<VAST> must contain at least one <Ad> or <Error>VAST-4.0-wrapper-root-error<VAST> root contains both <Ad> and <Error> elements (invalid per VAST 4.0)VAST-2.0-ad-has-inline-or-wrapperEach <Ad> must contain exactly one <InLine> or <Wrapper>VAST-2.0-inline-adsystem<InLine> must contain <AdSystem>VAST-2.0-inline-adtitle<InLine> must contain <AdTitle>