Cannot read property 'body' of null - Angular

Hi, I have a list of email template (page 'templates') and there is a button that open the edit (page 'templates/edit/:templateId'. All works fine, but when I go back into the templates' list I get this error in the console:

core.js:1624 ERROR TypeError: Cannot read property 'body' of null at Object.getBody (grapes.min.js:11) at Object.getWrapperEl (grapes.min.js:11) at R.i.getCanvasWrapper (grapes.min.js:11) at R.i.initialize (grapes.min.js:11) at R.i.e.View (grapes.min.js:2) at R.i [as constructor] (grapes.min.js:2) at new R.i (grapes.min.js:2) at Object.get (grapes.min.js:11)

>     at R.i.updateActive (grapes.min.js:11)
>     at y (grapes.min.js:2)

I tried also to implements OnDestroy into my edit component, but it doesn't effect:
`  ngOnDestroy() {
    this.grapejsComponent.destroy();
  }`

P.S. this.grapejsComponent is the following object:
`
  initGrape() {
    this.grapejsComponent = grapesjs.init({
        ..........
     })
    }`