Mywifiext.net isn’t a normal website. It doesn’t live on the internet. It’s just a local setup page that only works when your computer or phone is connected directly to the extender. If you’re on your main WiFi (like your router’s network), that address isn’t going to load — because your device is basically shouting into the wrong room. https://netgerext.net/cannot-get-mywifiext-to-come-up-ac1200-wifi-range-extender/