Still, in case the issue is not resolved then try to get in touch with netgear router tech support to get the issue addressed through advanced troubleshooting steps. More
Although usually users don’t face any issue while browsing this URL but there can be time when users come across an error message like “Unable to Connect.” It happens because this browsing URL is not an actual website. It is one of the local web addresses that can be used for setting up a Netgear wireless Wi-Fi range extenders. Whenever you face any issue while accessing this URL, you must verify whether the corresponding mobile device is in good connection with Netgear range extender or not.
