After much searching and purge + reinstall of both apache2 and zoneminder, I suspect the problem is CGI not enabled by default, so one must lauch "sudo a2encgi" after installing apache2 and before installing zoneminder.
After much searching and purge + reinstall of both apache2 and zoneminder, I suspect the problem is CGI not enabled by default, so one must lauch "sudo a2encgi" after installing apache2 and before installing zoneminder.