pagebuilder error

src/App.vue

@@ -17,7 +17,7 @@ export default {
   },
   data: function(){
     return {
-      data:''
+      data:'[{"label":"1 kolumna  ","name":"col_1","columns":[{"name":"col-md-12","items":[{"name":"core_section_textarea","text":""},{"name":"core_section_text","text":""}]}]}]'
     }
   }
 }