I am getting 500 Internal Server Error.

What could be causing this?

Here the .htaccess:

```
php_flag display_errors on
php_value error_reporting 9999

RewriteEngine On

RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-l

RewriteRule ^(.+)$ index.php?url=$1 [QSA,L]

```

If you need any more information please let me know, I will add it to the question.