`view_link_invalid`

HTTP 401authentication_error

This preview link has expired; open it again from the delivery page.

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": "authentication_error",
    "code": "view_link_invalid",
    "message": "This preview link has expired; open it again from the delivery page.",
    "param": null,
    "request_id": "req_5e69684dc3de68bf8651a712"
  }
}