We have been using this AX1800 4-Stream WiFi Mesh Extender EAX20 in our home for over 12 months now and it has been good. We are starting to have problems with reliable reception for our bedroom TV and I'm just working through the troubleshooting options. The issue seems to be between our wifi router (not a NetGear one) and the Extender rather than the TV. I've been trying to log into the Extender via a Chrome Browser and Firefox browser on Windows 10 using the IP adddresses which I think were correct originally. They don't work. I can log into my Wifi router ok via 10.1.1.1 and into my surveillance camera ok via the browser. I have used the Nighthawk app on my Pixel 3 but there is just a screen freeze as soon as it opens. Any suggestions please?
Log into your primary router and look at its attached devices page. that page should have what IP address the extender is at. It might have changed. Try that
