Problem to connect to elasticsearch

Hi,
I'm having some problems to create a report with a kind of data. The Flexmonster (version 2.7.3) keep on loading screen and the browser return some errors on the console.
 
ERROR

flexmonster.js.xhtml:9 Uncaught TypeError: B7k.Bf is not a function
    at X7k.Ke (flexmonster.js.xhtml:9)
    at X7k.aP (flexmonster.js.xhtml:9)
    at flexmonster.js.xhtml:9
    at i (elasticsearch.min.js?2.7.3:6)
    at h (elasticsearch.min.js?2.7.3:6)
    at XMLHttpRequest.d.onreadystatechange (elasticsearch.min.js?2.7.3:8)

DATA SAMPLE

{
"_index": "locomotive4",
"_type": "e",
"_id": "E81721242505168",
"_score": 0.001871863,
"_source": {
"loco": 8172,
"km": 0,
"speed": 0,
"vma": 0,
"press": 0,
"ibreak": 0,
"curr": 0,
"volt": 600,
"notch": 0,
"reverse": 0,
"buzzer": 0,
"bell": 0,
"isostate": 2,
"type": "E",
"dt": "2019/05/16 20:19:28",
"t": 1,
"block": null
}
}
,
{
"_index": "locomotive4",
"_type": "e",
"_id": "E81721242505171",
"_score": 0.001871863,
"_source": {
"loco": 8172,
"km": 0,
"speed": 0,
"vma": 0,
"press": 0,
"ibreak": 0,
"curr": 0,
"volt": 750,
"notch": 0,
"reverse": 0,
"buzzer": 0,
"bell": 0,
"isostate": 2,
"type": "E",
"dt": "2019/05/16 20:19:31",
"t": 1,
"block": null
}
}