This error code is generally returned when your request has failed validation. The response body will contain details of the specific error, e.g.:

  {
  "correlation_id": "7d5d7038-2f6a-4c70-86b2-71cac1e752c3",
  "code": "invalid_request",
  "message": "A provided property is invalid",
  "details": [
    {
      "property": "addresses[0].contact.contact_details.email",
      "code": "invalid_email",
      "message": "The provided email address is not valid"
    }
  ]
}