Firstly, thanks for your help with this! One of the things I love about FreeNAS is the ability to snapshot a dataset, so got everything setup ready for the install and then took a snapshot so I can roll back to start again at the click of a button!!
I've had another look and updated httpd.conf with the additional module settings.
Cleared out https-error.log and restarted the VM (jail)
Checked log before running the install and these were thrown with Apache starting:
Code:
[Mon Jul 18 20:19:29.361501 2016] [mpm_prefork:notice] [pid 59191] AH00163: Apache/2.4.23 (FreeBSD) PHP/5.6.23 configured -- resuming normal operation
[Mon Jul 18 20:19:29.361550 2016] [core:notice] [pid 59191] AH00094: Command line: '/usr/local/sbin/httpd'
Ran the installer and the same 'blank screen' issue at the end of the optional page. When I checked the error log, nothing new added.