`batch_empty_finalize`

HTTP 400invalid_request

This batch has no deliveries yet; add some before sending it out.

Handling it

Fix the request and send it again. message says what is wrong, and param names the parameter where there is one. Keep the request_id: it lets Parasend find the request.

The error, as the API returns it

{
  "error": {
    "type": "invalid_request",
    "code": "batch_empty_finalize",
    "message": "This batch has no deliveries yet; add some before sending it out.",
    "param": null,
    "request_id": "req_5e69684dc3de68bf8651a712"
  }
}