Here are the details of my issue:
I have a C-7 hub (I bought it like a year or more ago but only now setting it up as I am in my new home)
upgraded firmware from 220.127.116.11 to 18.104.22.168
I can see the hub, the light is green and I can browse to the IP address from my computer (on the same subnet) but the Register Hub option does absolutely nothing.
As a result I can do nothing else because the hub isn't registered.
I have had a Hubitat at my old home and it is still running and working well so I am not a novice to Hubitat but I am stumped.