What's wrong with my wifi connection? Also, what is MAC connection?

I've had my Xbox one s for a little over a year now. It was gifted to me by my brother in law. I don't know how long he has had it, but I know it was in storage for a while. The WiFi on it has worked since I got it, but all of a sudden today, its saying its not connected to the Xbox network. When i go to settings, it says that it's connected to my wifi, but NAT type and service info is "unavailable". When I click the "Test network connection" button, it pops up saying additional authentication is required. When I click authenticate now, it pops up to some website called msftconnecttest.com/redirect, but it says my device has been paused, and the page will close once I'm connected. The other option when it pops up with authentication is an "alternative MAC connection" and to be honest, I have no idea what that is.

:)