// Use **transitions.loadScene** instead of **cc.director.loadScene**
// cc.director.loadScene(url, this.onLoadSceneFinish.bind(this));
this.transitions.loadScene(url, 'Canvas/Main Camera', 'Canvas/Main Camera', this.onLoadSceneFinish.bind(this));

this.transitions.loadNode (fromCamera, fromRootNode, toCamera, toRootNode, onTransitionFinished)

{
  texture: { value: white }
  texture2: { value: white }
  time: { value: 0 }
  ratio: { value: 1 }
}