Could not reverse map the HTTPS VirtualHost to the original

Hi,

I’m trying to set up multiple domains on a single droplet. I have followed the various articles available on DO on setting up multiple vhosts and how to install a lets encrypt certificate. The certificate for the first domain installed fine, but when I try and install a certificate for the second domain, I get the following message;

Could not reverse map the HTTPS VirtualHost to the original

IMPORTANT NOTES:

• Unable to install the certificate
• Congratulations! Your certificate and chain have been saved at: /etc/letsencrypt/live/mydomain.net/fullchain.pem Your key file has been saved at: /etc/letsencrypt/live/mydomain.net/privkey.pem Your cert will expire on 2018-10-28. To obtain a new or tweaked version of this certificate in the future, simply run certbot again with the “certonly” option. To non-interactively renew all of your certificates, run “certbot renew”
• Some rewrite rules copied from /etc/apache2/sites-enabled/mydomain.net.conf were disabled in the vhost for your HTTPS site located at /etc/apache2/sites-available/mydomain.net-le-ssl.conf because they have the potential to create redirection loops.

I cannot find much information on the web and am looking for someone to point out where I’ve gone wrong.

Thanks,

Chris