Creating Pathways from Router

I've got a Chamberlain WiFi garage door opener - which must initially be paired to a network operating at 2.4 Ghz - that's not seeing my network.  I've been told Xfinity routers typically connect at 5.0 Ghz, to maximize speed.

I'm trying to log into 10.0.0.1, but the site will not accept the same username and password I use to log into my Xfinity account.

Any thoughts out there?

Thanks!