title: SonataMediaBundle: The file "" does not exist 500 Internal Server Error - FileNotFoundException
body: <p>I uploaded some files using the SonataMediaBundle but when i wanted to add another, i got that error.</p>
  
  <p>Have you any idea ?</p>
  
  <p>this is the stack error:</p>
  
  <pre><code>in /var/www/znata.com/vendor/symfony/symfony/src/Symfony/Component/HttpFoundation/File/MimeType/MimeTypeGuesser.php at line 107  -+
  
          public function guess($path)
          {
              if (!is_file($path)) {
                  throw new FileNotFoundException($path);
              }
              if (!is_readable($path)) {
  </code></pre>
  
  <p>Thanks</p>