"CanvasView.frame.el.contentDocument is null" in angular4

Hi I integrated grapejs with angular4.I added custom button.After click on edit button throwing error:- TypeError ​ columnNumber: 7 ​ fileName: "http://localhost:4200/vendor.js" ​ lineNumber: 78800 ​ message: "CanvasView.frame.el.contentDocument is null" ngOnInit() { console.log('oninit') this.editor = grapesjs.init({ allowScripts: 1, showOffsets: 1, autorender: 0, noticeOnUnload: 0, container : '#gjs', height: '100%', fromElement: true, clearOnRender: 0, storageManager: {autoload: 0}, }); } // edit(){ // console.log('edit',this.editor) // this.editor.runCommand('sw-visibility'); // this.name...