Cox Panoramic WiFi

My Cox Panoramic WiFi app is not allowing me to change my WiFi password. The App says I am “offline” but that’s not correct, I have internet. I just want to change my WiFi password. Cox customer service support gave me this IP address  192.168. 1.0 and 192.168.1.1 to get to the WiFi admin but the IP address sites can not be reached. Does anyone know how I can change my WiFi password for a Cox Panoramic WiFi without using the app?