Update App.js

public/Source/App.js

@@ -13,7 +13,8 @@
 		 // // Set default basemap
             imageryProvider : new Cesium.ArcGisMapServerImageryProvider({
     url : 'https://services.arcgisonline.com/ArcGIS/rest/services/World_Street_Map/MapServer',
-	enablePickFeatures: false,
+	enablePickFeatures: false
+    }),
 		 baseLayerPicker: true
 		 
      });