Pivoting loses cell values

Data source

HTML

<link rel="stylesheet" href="https://s3.amazonaws.com/flexmonster/2.3/demo.css">
<script src="https://cdn.flexmonster.com/flexmonster.js"></script>

<div id="pivot-container"></div>

JavaScript

let pivot = new Flexmonster({
  container: "#pivot-container",
  componentFolder: "https://cdn.flexmonster.com/",
  width: "100%",
  height: 850,
  toolbar: true,
  report: {
    "dataSource": {
      "type": "api",
      "url": "https://olap.flexmonster.com:9500",
      "index": "fm-product-sales",
      "mapping": {
        "Category": {
          "type": "string",
          "hierarchy": "Tree1"
        },
        "Color": {
          "type": "string",
          "hierarchy": "Tree1",
          "parent": "Category"
        },
        "Size": {
          "type": "string",
          "hierarchy": "Tree1",
          "parent": "Color"
        },
        "Country": {
          "type": "string",
          "hierarchy": "Tree2"
        },
        "Destination": {
          "type": "string",
          "hierarchy": "Tree2",
          "parent": "Country"
        },
      }
    },
    "slice": {
  columns: [{
  uniqueName: "Tree2"
}],
  drills: {
    columns: [{
  tuple: ["Tree2.[Australia]"]
}, {
  tuple: ["Tree2.[Canada]"]
}, {
  tuple: ["Tree2.[France]"]
}, {
  tuple: ["Tree2.[Germany]"]
}, {
  tuple: ["Tree2.[United Kingdom]"]
}, {
  tuple: ["Tree2.[United States]"]
}],
    rows: [{
  tuple: ["Tree1.[Accessories]"]
}, {
  tuple: ["Tree1.[Bikes]"]
}, {
  tuple: ["Tree1.[Clothing]"]
}, {
  tuple: ["Tree1.[Components]"]
}, {
  tuple: ["Tree1.[Cars]"]
}, {
  tuple: ["Tree1.[Accessories].[green]"]
}]
  },
  measures: [{
  aggregation: "sum",
  grandTotalCaption: "Price",
  uniqueName: "Price"
}, {
  aggregation: "sum",
  grandTotalCaption: "Quantity",
  uniqueName: "Quantity"
}],
  rows: [{
  uniqueName: "Tree1"
}, {
  uniqueName: "[Measures]"
}]
}/*,
                options: {
                            grid: {
                                    showHeaders: false,
                                    showGrandTotals: "off",
                                    showHierarchies: false,
                                    showHierarchyCaptions: true,
                          ...