Notifications by SweetAlert2 (#1508)

src/Controller/SystemConfigurationController.php

@@ -144,7 +144,7 @@ final class SystemConfigurationController extends AbstractController
                     $this->repository->saveSystemConfiguration($form->getData());
                     $this->flashSuccess('action.update.success');
                 } catch (\Exception $ex) {
-                    $this->flashError('action.update.error', ['%reason%' => $ex->getMessage()]);
+                    $this->flashUpdateException($ex);
                 }
 
                 return $this->redirectToRoute('system_configuration');