add error view 500 to app config

web.php

@@ -137,7 +137,8 @@ $appConfig = [
     'antiCsrfTokenErrorResponse' => ['error' => 'no_valid_anti_csrf_token'],
     'antiCsrfTokenExceptions' => [],
     'loginRouteId' => 'login',
-    'error404View' => 'error/404'
+    'error404View' => 'error/404',
+    'error500View' => 'error/500'
 ];
 
 $httpReponse = new HttpResponse(