Resolve #3426325

Closes #3426325

src/Form/MessagesForm.php

@@ -262,7 +262,7 @@ class MessagesForm extends FormBase {
 
     $template_exist = \Drupal::service('load.databaseinnfo.service')->get_notify_email_template();
     if ($template_exist) {
-      $request_time = Drupal::time()->getRequestTime();
+      $request_time = \Drupal::time()->getRequestTime();
       $query = \Drupal::database()->delete('page_notify_email_template');
       $query->condition('template_id', $template_exist['template_id']);
       $query->execute();