@lukekfrost the FOG install doesn’t like it when the ip address of the imaging interface is changed after FOG is installed. There are several locations where the static IP address is recorded. You linked to the wiki page, also this post addresses the same issue as you have today. https://forums.fogproject.org/topic/15112/changed-ip-reinstalling-not-an-option
My unoffical instructions are to
Update the hidden file /opt/fog/.fogsettings fix the IP address in there. Update the IP address in /tftpboot/default.ipxe Update the IP address in the web ui under fog configuration->fog settings->expand all. search for the old IP address and replace it with the new address. In the fog storage node default, change the IP address in there. Back in the fog server linux console, rerun the FOG installer to fix the remaining bits.