I bought a used Hubitat months ago and have not been able to get it to work. I emailed support and was told "Looks like the hub was connected to the cloud a few days ago. I went ahead and updated the admin account with your email address".
I have never been able to get the hub to connect to the cloud, not sure why support thought differently. Nothing comes up when I "Find Hubs". On computer I do not have any registered hubs. On my phone's Android App I have one, "My New Hub" @ 192.168.1.200, but a popup always says "Hub Unavailable". On my router's admin page I do not see my hub's MAC address.
I have tried searching for the hub thru advanced discovery using the hub's MAC and using each wired and wireless client on the router admin page. I don't see anything at "http/hubitat/". I have tried multiple different cords. I have tried multiple different browsers on Windows and Linux.
Have you followed the Hubitat Documentation which shows how to press the small button, on the bottom of the hub, for 7 seconds to reset the hub’s network configuration back to DHCP? That may be enough for the hub to get a DHCP assigned IP address, and allow you to find/access the hub.