Xfinity app constantly shows "You're already signed in as: username" when log in
I try to log in to xfinity app to set up my modem. After I input my username, password and verification code, the app shows "You're already signed in as: username" and a continue option. When I hit the continue button, the same page appear again.
I logged in to my account on website and it has no issue.
Any idea how to make the app work? Thanks.