AI-generated Key Takeaways
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The content lists numerous Ad Manager API services with links to their FeatureError.Reason documentation for version v202508.
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Each listed service includes a link pointing to details about potential FeatureError.Reason instances, specifically related to features not enabled on the network.
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The
FeatureError.Reasonenumeration indicates why a feature error occurred, withMISSING_FEATUREandUNKNOWNbeing the defined reasons. 
- Namespace
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https://www.google.com/apis/ads/publisher/v202508 
| Enumeration | Description | 
|---|---|
                        MISSING_FEATURE
                      | 
                     A feature is being used that is not enabled on the current network. | 
                        UNKNOWN
                      | 
                     The value returned if the actual value is not exposed by the requested API version. |