On the dev environment, when I have a user rights problem I have a nice stacktrace symfony with all the details of the error.
In production. I have this very sober message in black on a white background.
Oops! An Error Occurred
The server returned a “403 Forbidden”.
Something is broken. Please let us know what you were doing when this error occurred. We will fix it as soon as possible. Sorry for any inconvenience caused.
How can I stylize this mistake?