diff --git a/demos/editor-cdn/App.vue b/demos/editor-cdn/App.vue
index 480916f..c25defe 100644
--- a/demos/editor-cdn/App.vue
+++ b/demos/editor-cdn/App.vue
@@ -37,7 +37,7 @@
 </template>
 
 <script setup lang="ts">
-import { ref, reactive, computed } from 'vue';
+import { ref, reactive, computed, effect } from 'vue';
 import useCKEditorCloud from '../../src/useCKEditorCloud.js';
 import type { EventInfo, ClassicEditor } from 'https://cdn.ckeditor.com/typings/ckeditor5.d.ts';
 
@@ -46,6 +46,12 @@ const cloud = useCKEditorCloud( {
 	version: '43.0.0'
 } );
 
+effect( () => {
+	if ( cloud.error.value ) {
+		console.error( cloud.error.value );
+	}
+} );
+
 const TestEditor = computed<typeof ClassicEditor | null>( () => {
 	if ( !cloud.data.value ) {
 		return null;