I'm setting up a new web server that hosts a dozen virtual hosts on Ubuntu 12.4 using Apache 2.2.22 with one config file per site. I created all the configuration files all at once and ran
a2ensite * to enable them all at once. When I reloaded the configuration it failed and after restarting apache I found the following error message in my error.log:
Oops, no RSA or DSA server certificate found for 'server.host.name:0'?!
Most of the results for this error message are years old that don't fix the problem or are bugs that have been fixed https://issues.apache.org/bugzilla/show_bug.cgi?id=31709