Have a new hub, new account. After discovery it prompted to update to the latest version of code, which I did. Now when I click "register hub" or any other link/button for that matter, nothing happens. I tried rebooting it. I tried a different browser.
Let’s start with are you using the app (iOS or Android?) or a browser (which one(s))? Then what page are you trying to use? (The fact that you were able to update to the latest firmware suggests that the hub may be registered at this point.) Lastly, does http://hubitat.local work for you?
hubitat.local is where I am. None of the buttons work. They act like the click but nothing happens. The buttons that are exterior to the hub, like "find other hubs" and "my account" work. Direct hub buttons do not. Like Apps, Devices, register, rooms, etc.