Can't Log In to Xfinity on Chrome

When I click on "Sign In" on xfinity.com from a Chrome browser, I get an error message "This site can't be reached".  This is happening on a Chromebook and on three different computers.  I am able to log in from Chrome using an incognito tab and can log in with the Edge browser.

Chrome is up to date on all machines.  All machines are on a wired LAN with xFinity internet.