"CanvasView.frame.el.contentDocument es nulo" en angular4

contenedor: '#gjs',
            Altura: '100%',
            fromElement: cierto,
            clearOnRender: 0,
            storageManager: {autoload: 0},

});
  }

edit(){
  console.log('editar', esto.editor)
  this.editor.runCommand('sw-visibility');
  this.nameModel='hola uvas editar!'
  this.editor.render();
  // }
  editBtn(){
    console.log('editBtn', this.editor)
    this.editor.setComponents(this.editor.getHtml())
    this.editor.runCommand('sw-visibility');
    document.getElementById("previsualización").style.display = "bloque";
    document.getElementById("edit").style.display = "ninguno";
  }
! [imagen](https://user-images.githubusercontent.com/41565928/43061645-a446decc-8e73-11e8-9718-ab9c2ce5df47.png)

Gracias,
Sandeep Kumar.