Xfinity stream app not working

I have a Sony Bravo TV and a Roku Ultra 4660X. Up until I changed my modem, my Stream app was working fine. Now it will only show my purchases. It is connected to my home internet, I have uninstalled and reinstalled the app, I have logged out of the app and logged back in and my account is current. Why is it no longer working? I have Xfinity internet at the 1gb speed.