XB7-T Model Cannot be Activated with App

I have just received equipment for an XB7-T Gateway router, and I am unable to activate the WiFi within the Xfinity app. When I manually try to activate, I just get kicked back out to the main overview page. I was able to name and set a password for my network, but it does not appear in my list of WiFi networks on any of my devices. The router’s lights are all solid white. I have tried the following trouble shooting:

- replugging in the power and coax cables, and tried multiple outlets. 
- restarting my mobile device

- deleting and reinstalling the app

- signing out and back in

- discussed with the AI chatbot that told me to navigate to a “restart gateway” tab in the app, which does not appear for me. 

Any help would be much appreciated!