Loading csv via dataserver is showing blank page

I tried to load csv via dataserver but it is showing blank page , Checked dataserver and index,it was also ok.

 

i used below code 

 

   <script type="text/javascript">

const pivot = new Flexmonster({

  container: "pivotContainer",

  toolbar: true

});

const pivot = new Flexmonster({

   container: "pivotContainer",

   toolbar: true,

   report: {

dataSource: {

  type: "api",

  url: "http://localhost:9500",

  index: "data"

}

  },

                    licenseKey: "Z7HS-XCBC6C-4B3I40-6E5O26"

                });

            </script>