为每个用户创建文件夹

I've faced a problem when I was trying to set an htaccess code in my website

the code :

Options All -Indexes
Options +MultiViews
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_FILENAME} !-l
RewriteRule ^(.*)$ user.php?q=$1

Now it's working when the url is : www.example.com/john it displays the user profile as www.example.com/user.php?q=john

but when the url became www.example.com/blablabla/ it displays a destroyed webpage ! like this:

What to do please ?