Apache 2.4 now use .conf files for vhost, so you need to upgrade your old vhost
for name in `ls /etc/apache2/sites-available|grep -v conf`;do
sudo mv /etc/apache2/sites-available/$name /etc/apache2/sites-available/$name.conf ;
done
Apache 2.4 now use .conf files for vhost, so you need to upgrade your old vhost
for name in `ls /etc/apache2/sites-available|grep -v conf`;do
sudo mv /etc/apache2/sites-available/$name /etc/apache2/sites-available/$name.conf ;
done