You may install the latest version of the CMS (2.0.0)

# apt-get install -y hubzero-cms-2.0.0

or install the previous version of the CMS (1.3.1)

# apt-get install -y hubzero-cms-1.3.1

# hzcms install example

It is necessary to immediately run the updater to apply fixes that have not been incorporated into the initial installation.

# hzcms update

# a2dissite default default-ssl 
# a2ensite example example-ssl 
# /etc/init.d/apache2 restart

The default installation of the CMS uses a self signed SSL certificate. Some browers will not accept this certificate and not allow access to the site.
 

https://support.mozilla.org/en-US/questions/1012036

You will need to install a proper SSL certificate.