Cesium 1.1 tiling data failed to load

[jayantpaliwal]

I have generated tiling data from cesium ion.
https://github.com/CesiumGS/3d-tiles/tree/draft-1.1/specification/ImplicitTiling
but the viewer is not rendering the data. the issue is unable to read file from subtree structure.

{
  "asset": {
    "version": "1.1",
    "extras": {
      "ion": {
        "georeferenced": false,
        "movable": true
      }
    }
  },
  "schema": {
    "id": "cesium-tiling-pipeline",
    "classes": {
      "tile": {
        "properties": {
          "tightBoundingBox": {
            "name": "Tight Bounding Box",
            "type": "SCALAR",
            "componentType": "FLOAT64",
            "array": true,
            "count": 12,
            "semantic": "TILE_BOUNDING_BOX"
          }
        }
      }
    }
  },
  "geometricError": 21.495847061053393,
  "root": {
    "boundingVolume": {
      "box": [2.15731143951416, 10.192809104919434, 0.8775157928466797, 12.410633087158203, 0.0, 0.0, 0.0, 12.410633087158203, 0.0, 0.0, 0.0, 12.410633087158203]
    },
    "geometricError": 0.7218289051132697,
    "refine": "REPLACE",
    "content": {
      "uri": "tiles/{level}/{x}/{y}/{z}.glb"
    },
    "metadata": {
      "class": "tile",
      "properties": {
        "tightBoundingBox": [2.15731143951416, 8.006588459014893, -0.9987449645996094, 12.410633087158203, 0.0, 0.0, 0.0, 10.224412441253662, 0.0, 0.0, 0.0, 10.534372329711914]
      }
    },
    "implicitTiling": {
      "subdivisionScheme": "OCTREE",
      "subtreeLevels": 6,
      "availableLevels": 6,
      "subtrees": {
        "uri": "subtrees/{level}/{x}/{y}/{z}.subtree"
      }
    }
  }
}