Unable to create conversation reply using admin id

I kept getting the following error when trying to reply to a whatsapp message using an admin type with the admin_id retrieved from the admin endpoint

{
  "type": "error.list",
  "request_id": "003ririmu25u6re52260",
  "errors": [
    {
      "code": "not_found",
      "message": "User Not Found"
    }
  ]
}