Kibana Watcher using monitoring index

Elastic Stack Kibana
,
8

Can you try to run the following?
Please paste the full response.

GET %3C.monitoring-es-6-%7Bnow%2Fd%7Byyyy.MM.dd%7D%7D%3E/_search
{
  "size": 1,
  "query": {
    "bool": {
      "filter": [
        {
          "range": {
            "timestamp": {
              "from": "now-30m",
              "to": "now"
            }
          }
        },
        {
          "prefix": {
            "index_stats.index": "my_index_name-"
          }
        }
      ]
    }
  },
  "aggs": {
    "indices": {
      "terms": {
        "field": "index_stats.index",
        "size": 20
      },
      "aggs": {
        "statistics": {
          "stats": {
            "field": "index_stats.total.docs.count"
          }
        }
      }
    },
    "total_max": {
      "sum_bucket": {
        "buckets_path": "indices>statistics.max"
      }
    },
    "total_min": {
      "sum_bucket": {
        "buckets_path": "indices>statistics.min"
      }
    }
  }
}

If you get no response, please check if the cluster has an index with prefix my_index_name-