VAST-3.0-iconclicks-unknown-child
VAST-3.0-iconclicks-unknown-child
<IconClicks> contains an unrecognised child element
ErrorSchemaIAB VAST 3.0 §2.4.5VAST 3.0, 4.0, 4.1, 4.2, and 4.3
Short answer
<IconClicks> may only contain <IconClickThrough>, <IconClickTracking>, and <IconClickFallbackImages> elements.
Why this matters in production
This rule is usually a delivery blocker. Many players, SDKs, and ad servers will discard the response or skip the affected creative once this condition is hit. Schema violations tend to create parser disagreement. One system may recover while another drops the tag entirely, which is why these bugs often show up as environment-specific fill loss. Affected scope: VAST 3.0, 4.0, 4.1, 4.2, and 4.3.
How to fix
Remove the unrecognised element — <IconClicks> accepts only <IconClickThrough>, <IconClickTracking>, and <IconClickFallbackImages>.
Check your VAST tag for
VAST-3.0-iconclicks-unknown-child and other issues instantly.Validate a tag →Other Schema rules
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