Connection to the server has been lost.

I'm installing Untangle 11.1 64bit on a Dell Poweredge 2950 for a customer. The system seems to be working fine, but I've been doing it sort of intermittently among the rest of the insanity that is my home on a Saturday evening. Is there a timeout or something within which first boot must be completed? I had just saved the interface mapping, and was on the screen configuring external as DHCP, when I clicked next, I got the error "Connection to the server has been lost". Refreshing the browser gave me an option to restart the wizard where I left off and configuration completed without a hitch.

Normal?
Strange?
Sign of impending doom? :lol