Domain name without www is not working

Everything was working perfectly, but now, without www I end up with the following page :

f493168dba83126a

I am using cloudflare and it redirects to the same ip, and here is my apache configuration for this website

<VirtualHost *:80>
    ServerAdmin contact@domain.com
    ServerName domain.com
    ServerAlias www.domain.com

    DocumentRoot /var/www/domainfolder
    <Directory />
            Options FollowSymLinks
            AllowOverride All
    </Directory>

With of course domain replaced by my domain.