AI-generated Key Takeaways
- 
          The content provides a list of various Ad Manager API services, each linked to its documentation. 
- 
          It defines the InternalApiError.Reasonenumeration, which specifies causes for internal API errors.
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          Possible reasons for internal API errors include unexpected errors, transient errors, unknown issues, downtime, and errors generating responses. 
The single reason for the internal API error.
- Namespace
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               https://www.google.com/apis/ads/publisher/v202508
| Enumeration | Description | 
|---|---|
| UNEXPECTED_INTERNAL_API_ERROR | API encountered an unexpected internal error. | 
| TRANSIENT_ERROR | A temporary error occurred during the request. Please retry. | 
| UNKNOWN | The cause of the error is not known or only defined in newer versions. | 
| DOWNTIME | The API is currently unavailable for a planned downtime. | 
| ERROR_GENERATING_RESPONSE | Mutate succeeded but server was unable to build response. Client should not retry mutate. |