Trying to create watcher but getting payload is "ctx.payload.hits.total.value" : null

Hi Team,

I am trying to create a watcher for 1 error message but I get stuck. I have executed steps from elasticsearch document
https://www.elastic.co/guide/en/elasticsearch/reference/current/watcher-getting-started.html

Code :-

PUT _watcher/watch/log_error_watch
{
  "trigger" : { "schedule" : { "interval" : "10s" }},
  "input" : {
    "search" : {
      "request" : {
        "indices" : [ "logs" ],
        "body" : {
          "query" : {
            "match" : { "message": "error" }
          }
        }
      }
    }
  },
  "condition" : {
    "compare" : { "ctx.payload.hits.total.value" : { "gt" : 0 }}
  },
  "actions" : {
    "log_error" : {
      "logging" : {
        "text" : "Found {{ctx.payload.hits.total.value}} errors in the logs"
      }
    }
  }
}

Index creation :-

POST logs/event
{
    "timestamp" : "2020-03-24T07:03:51.685Z",
    "request" : "GET index.html",
    "status_code" : 404,
    "message" : "error: File not found"
}

Result of watcher :-

POST _watcher/watch/log_error_watch/_execute
{
  "_id" : "log_error_watch_c99f9ae7-12ed-4331-b3bc-c148664b1653-2020-03-24T08:33:40.678448Z",
  "watch_record" : {
    "watch_id" : "log_error_watch",
    "node" : "vBu9Vw1NSH2ipE1QZMbl7g",
    "state" : "execution_not_needed",
    "user" : "YeruvaS",
    "status" : {
      "state" : {
        "active" : true,
        "timestamp" : "2020-03-24T08:22:31.849Z"
      },
      "last_checked" : "2020-03-24T08:33:40.678Z",
      "actions" : {
        "log_error" : {
          "ack" : {
            "timestamp" : "2020-03-24T08:22:31.849Z",
            "state" : "awaits_successful_execution"
          }
        }
      },
      "execution_state" : "execution_not_needed",
      "version" : 714
    },
    "trigger_event" : {
      "type" : "manual",
      "triggered_time" : "2020-03-24T08:33:40.678Z",
      "manual" : {
        "schedule" : {
          "scheduled_time" : "2020-03-24T08:33:40.678Z"
        }
      }
    },
    "input" : {
      "search" : {
        "request" : {
          "search_type" : "query_then_fetch",
          "indices" : [
            "logs"
          ],
          "rest_total_hits_as_int" : true,
          "body" : {
            "query" : {
              "match" : {
                "message" : "error"
              }
            }
          }
        }
      }
    },
    "condition" : {
      "compare" : {
        "ctx.payload.hits.total.value" : {
          "gt" : 0
        }
      }
    },
    "result" : {
      "execution_time" : "2020-03-24T08:33:40.678Z",
      "execution_duration" : 1,
      "input" : {
        "type" : "search",
        "status" : "success",
        "payload" : {
          "_shards" : {
            "total" : 1,
            "failed" : 0,
            "successful" : 1,
            "skipped" : 0
          },
          "hits" : {
            "hits" : [
              {
                "_index" : "logs",
                "_type" : "event",
                "_source" : {
                  "request" : "GET index.html",
                  "status_code" : 404,
                  "message" : "error: File not found",
                  "timestamp" : "2020-03-24T07:03:51.685Z"
                },
                "_id" : "p2ujC3EBS96CV1bgIWb_",
                "_score" : 0.18232156
              },
              {
                "_index" : "logs",
                "_type" : "event",
                "_source" : {
                  "request" : "GET index.html",
                  "status_code" : 404,
                  "message" : "error: File not found",
                  "timestamp" : "2020-03-24T07:03:51.685Z"
                },
                "_id" : "5WujC3EBS96CV1bgKGZ5",
                "_score" : 0.18232156
              }
            ],
            "total" : 2,
            "max_score" : 0.18232156
          },
          "took" : 0,
          "timed_out" : false
        },
        "search" : {
          "request" : {
            "search_type" : "query_then_fetch",
            "indices" : [
              "logs"
            ],
            "rest_total_hits_as_int" : true,
            "body" : {
              "query" : {
                "match" : {
                  "message" : "error"
                }
              }
            }
          }
        }
      },
      "condition" : {
        "type" : "compare",
        "status" : "success",
        **"met" : false**,
        "compare" : {
          "resolved_values" : {
            **"ctx.payload.hits.total.value" : null**
          }
        }
      },
      "actions" : [ ]
    },
    "messages" : [ ]
  }
}

But condition is coming false.

"condition" : {
        "type" : "compare",
        "status" : "success",
        "met" : false,
        "compare" : {
          "resolved_values" : {
            "ctx.payload.hits.total.value" : null
          }
        }
      }

Can you please give me the right direction to solve this issue.

I have removed ctx.payload.hits.total.value from value. Now

"condition" : {
              "type" : "compare",
              "status" : "success",
              "met" : true,
              "compare" : {
                "resolved_values" : {
                  "ctx.payload.hits.total" : 1
                }
              }