sentinl: Reporting seems to not work (no mail sent)

I tested reporting feature, and I never received email with report. I see the following logs telling that report is going to be created. But no email is sent.

{"type":"log","@timestamp":"2017-01-03T11:16:00Z","tags":["status","info","Sentinl"],"pid":59177,"message":"Executing report: reporter-test-fba"}
{"type":"log","@timestamp":"2017-01-03T11:16:00Z","tags":["status","info","Sentinl"],"pid":59177,"message":"Processing action: report_admin"}
{"type":"log","@timestamp":"2017-01-03T11:16:00Z","tags":["status","info","Sentinl","report"],"pid":59177,"message":"Subject: Sentinl Report, Body: Sample Sentinl Screenshot Report"}
{"type":"log","@timestamp":"2017-01-03T11:16:00Z","tags":["status","info","Sentinl","report"],"pid":59177,"message":"Creating Report for http://127.0.0.1:10235/app/kibana#/dashboard/MY-DASHBOARD"}

In kibana console output (not log file), I see the following error :

Unhandled rejection Error: spawn phantomjs ENOENT
    at exports._errnoException (util.js:873:11)
    at Process.ChildProcess._handle.onexit (internal/child_process.js:178:32)
    at onErrorNT (internal/child_process.js:344:16)
    at nextTickCallbackWith2Args (node.js:442:9)
    at process._tickDomainCallback (node.js:397:17)

Here’s the data about my test :

• Kibana 4.6.3 on Windows 10
• last sentinl version : downloaded on january 3rd 2017
• my reporter configuration :

{
  "_index": "watcher",
  "_type": "watch",
  "_id": "reporter-test-fba",
  "_score": 1,
  "_source": {
    "trigger": {
      "schedule": {
        "later": "at 11:20 am"
      }
    },
    "report": true,
    "actions": {
      "report_admin": {
        "report": {
          "to": "fbaligand@mycompany.fr",
          "from": "kibana-dev@mycompany.fr",
          "subject": "Sentinl Report",
          "priority": "high",
          "body": "Sample Sentinl Screenshot Report",
          "snapshot": {
            "res": "1280x900",
            "url": "http://127.0.0.1:10235/app/kibana#/dashboard/MY-DASHBOARD",
            "path": "/tmp/",
            "params": {
              "delay": 5000
            }
          }
        }
      }
    }
  }
}