| Q | A | ---------------- | ----- | Bug report? | yes | Feature request? | no | BC Break report? | no | RFC? | yes/no | Symfony version | 3.2.3 I'm using the information found on this page http://symfony.com/doc/current/event_dispatcher/before_after_filters.html to implement the before filter. I did exactly as described to throw an AccessDeniedHttpException and it works fine on dev but on prod it gives a 500 erorr instead of a 403.