How do I fix VAST-2.0-wrapper-adsystem?

Add ` Your Ad Server ` as a child of ` `.

What does the VAST error " must contain " mean?

Just like ` `, every ` ` element must identify the ad server via ` `. This allows the chain of wrappers to be traced back to its origin.

VAST-2.0-wrapper-adsystem

<Wrapper> must contain <AdSystem>

ErrorRequired fieldsIAB VAST 2.0 §2.5VAST 2.0 and later (all versions)

Just like `<InLine>`, every `<Wrapper>` element must identify the ad server via `<AdSystem>`. This allows the chain of wrappers to be traced back to its origin.

How to fix

Add <AdSystem>Your Ad Server</AdSystem> as a child of <Wrapper>.

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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>