diff --git a/src/Controller/DataController.php b/src/Controller/DataController.php
index 5a3e2b6..54468fa 100644
--- a/src/Controller/DataController.php
+++ b/src/Controller/DataController.php
@@ -44,6 +44,7 @@ class DataController extends ControllerBase {
    */
   public function eventslist() {
     $config = \Drupal::config('calendly.settings');
+    $final_data=[];
 
     $events_info = $config->get('events_info');
 
@@ -58,8 +59,10 @@ class DataController extends ControllerBase {
         'event_type' => t('Event Type'),
         'link' => t('Link'),
       ];
+      if (isset($event_list['collection']) && is_array($event_list['collection']) && $event_list['collection']) {
 
       foreach ($event_list['collection'] as $key => $value) {
+        
         $final_data[$key]['name'] = $value['name'];
         $final_data[$key]['scheduling_url'] = $value['scheduling_url'];
         $final_data[$key]['created_at'] = $value['created_at'];
@@ -75,7 +78,7 @@ class DataController extends ControllerBase {
 
         $final_data[$key]['#markup'] = new FormattableMarkup('<a href=":link">Generate Block</a>!', [':link' => $block_url]);
       }
-
+    }
       $build['tables'] = [
         '#type' => 'table',
         '#header' => $header,