Apache throws the following errors after attempting to set up ssl certificates:
[ssl:emerg] [pid 30907] AH02572: Failed to configure at least one certificate and
I also had the same problem. In my case I had also just included extra/httpd-ssl.conf as some of the others had mentioned. As said above, make sure you have entries in this file for
SSLCertificateFile "/usr/local/etc/apache24/ssl.crt/mydomaincertificate.crt"
SSLCertificateKeyFile "/usr/local/etc/apache24/ssl.key/myprivatekey.key"
Even though the same entries are in extra/httpd-vhosts.conf for my main domain. I also had to make sure that in httpd.conf the "ServerName" entry matched a name in the certificate.
While this is off no use to the OP, it may be of use to someone like me searching on this error after setting up SSL