INTERNAL"INVALID_ARGUMENT"NOT_FOUND"PERMISSION_DENIED"INTERNAL": This is a backend error. Refer to this link- https://developers.google.com/doubleclick-advertisers/core_errors#INTERNAL_SERVER_ERRORINVALID_ARGUMENT": If a value is invalid in the given request. For example, the timestamp given in the request is too old or given in seconds, then it will return 'invalid argument' error with a message that timestamp is too old.NOT_FOUND": Please check the FAQ document which includes 'NotFound' scenarios. FAQ document: https://developers.google.com/doubleclick-advertisers/guides/conversions_faqPERMISSION_DENIED": It is mostly OAuth related or permission issue for a given profile in the request