E-mail on Android Device Stopped Working

As of December 1, my e-mail app on my Samsung S10 can no longer validate my comcast.net e-mail account.  Attempting to set up the account again as shown on https://www.xfinity.com/support/articles/android-configure-comcast-email doesn't allow me to enter the password in step 3.  As soon as I tap on the password field, it takes me to step 4, where after I enter my password I get an error message saying "Unable to validate account", and the screen in step 3 is shown with a blank password field, since I can't enter it there.