Symfony 2: 404 Not Found Error when tryes to open

Question

I am getting this error message when try to open

/app_dev.php

An error occurred while loading the web debug toolbar (404: Not Found).

Do you want to open the profiler?

When I click ok, I am getting then the error:

app_dev.php/_profiler/5053258a822e1

and

404 Not found

I am using nginx

Thank you very much for your help.

EDIT: Here is the error log:

[error] 18369#0: *9 open() "/var/www/Symfony/web/app_dev.php/_wdt/5056f875afc98" failed (20: Not a directory), client: 127.0.0.1, server: symfony, request: "GET /app_dev.php/_wdt/5056f875afc98 HTTP/1.1", host: "symfony", referrer: "http://symfony/app_dev.php"
[error] 18369#0: *9 open() "/var/www/Symfony/web/404" failed (2: No such file or directory), client: 127.0.0.1, server: symfony, request: "GET /app_dev.php/_wdt/5056f875afc98 HTTP/1.1", host: "symfony", referrer: "http://symfony/app_dev.php"

EDIT 2:

When i try to access app_dev.php the page opens but without the toolbar and when I try with app_dev.php/ I am getting the

**Oops! An Error Occurred
The server returned a "404 Not Found".
Something is broken. Please e-mail us at [email] and let us know what you were doing when this error occurred. We will fix it as soon as possible. Sorry for any inconvenience caused. **

error.

Answer 1

It happened in my dev environnement, so I comment the directive DirectoryIndex in my vhost config file, so now I get to my app with : http://127.0.0.1/app_dev.php And no more errors about the profiler ! I use Symfony 2.3.x.