Trying to load the gltf link from the Firebase Storage

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1

I have a gltf file which exist in firebase storage folders and related textures are also located in that folders. I want to load that object into my view .

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I tried get download url of gltf file from firebase and pass it it GLTFLoader. But model was not loaded to view. Console error shows could not load textures files. I tried with this ,

this.storage.ref('3D-Models/' + folderNo + '/sphere.gltf').getDownloadURL().subscribe((url) => {

 const loader = new GLTFLoader()
    loader.load(
      url,
         (gltf) => {
            gltf.scene.traverse(  ( child ) => {
              if ( child instanceof THREE.Mesh ) {                  
                  console.log(child.material.metalness)
                  if(child.material.metalness){
                    child.material.envMap = texture;
                  }                      
              }            
          } );            
            var parent = gltf.scene;
            var box = new THREE.Box3().setFromObject(parent)
            var center = box.getCenter(new THREE.Vector3())
            var size = box.getSize(new THREE.Vector3())
            var maxAxis = Math.max(size.x,size.y,size.z)            
            parent.scale.multiplyScalar(1/maxAxis)
            box.setFromObject(parent);
            box.getCenter(center)
            box.getSize(size)
            parent.position.copy(center).multiplyScalar(-1)           
            scene.add(gltf.scene)           
        },
        (xhr) => {
            console.log((xhr.loaded / xhr.total) * 100 + '% loaded')
        },
        (error) => {
            console.log(error)
        }
    )
},
err => {
  console.log('error : ' + JSON.stringify(err))
});

If anyone can help me how to load gltf file from firebase storage