Extender doesn't work with Router after installing VPN

The extender' led for power and WPS/Mode are solid and green

The Router and Device lights are off.

I have not reinstalled the Extender. When I attempted to get to the Netgear page after typing xxxxxx and then selecting xxx to log into the extender, I received a message on a new tab "This site cannot be reached". Where xxxxx is the login URL.

I had to reset the router back to factory settings to get the VPN installed.

I can't remember how I installed the extender, except to say that once the cable was connected from the router to the plug socket it seemed to work pretty well.