The Budget Order Report type is not part of the regular set of Google Adwords reports.
Before pulling a BUDGET_ORDER_REPORT please ensure that:
- the grantee has access to the manager account that owns a particular billing customer.
- the grantee has access to the client account that should use the billing customer.
- the grantee is whitelisted for BudgetOrderService.
For more detailed information please visit: https://developers.google.com/adwords/api/docs/guides/budget-order