My bad, the error it shows is this:
This webpage has a redirect loop
ERR_TOO_MANY_REDIRECTS
The generated configuration file looks like this:
<IfModule mod_ssl.c>
<VirtualHost *:443>
ServerName www.example.com
ServerAlias example.com
ServerAdmin webmaster@localhost
DocumentRoot /var/www/www.example.com/public_html
SSLCertificateFile /etc/letsencrypt/live/www.example.com/cert.pem
SSLCertificateKeyFile /etc/letsencrypt/live/www.example.com/privkey.pem
Include /etc/letsencrypt/options-ssl-apache.conf
SSLCertificateChainFile /etc/letsencrypt/live/www.example.com/chain.pem
</VirtualHost>
</IfModule>
As a side note, I've now used up all of my allotted certificate generations with testing...
There were too many requests of a given type :: Error creating new cert :: Too many certificates already issued for: example.com
Please see the logfiles in /var/log/letsencrypt for more details.