diff --git a/core/lib/Drupal/Core/Form/EventSubscriber/FormAjaxSubscriber.php b/core/lib/Drupal/Core/Form/EventSubscriber/FormAjaxSubscriber.php
index 35d6e85..aa033ba 100644
--- a/core/lib/Drupal/Core/Form/EventSubscriber/FormAjaxSubscriber.php
+++ b/core/lib/Drupal/Core/Form/EventSubscriber/FormAjaxSubscriber.php
@@ -11,7 +11,6 @@
 use Drupal\Core\Form\FormAjaxResponseBuilderInterface;
 use Symfony\Component\EventDispatcher\EventSubscriberInterface;
 use Symfony\Component\HttpKernel\Event\GetResponseForExceptionEvent;
-use Symfony\Component\HttpKernel\Exception\HttpException;
 use Symfony\Component\HttpKernel\KernelEvents;
 
 /**
@@ -60,7 +59,7 @@ public function onException(GetResponseForExceptionEvent $event) {
         $response->headers->set('X-Status-Code', 200);
         $event->setResponse($response);
       }
-      catch (HttpException $e) {
+      catch (\Exception $e) {
         // Otherwise, replace the existing exception with the new one.
         $event->setException($e);
       }