Can't sign in through NIS but online successfully

Hi, how are you?  I have NIS version 22.9.1.12.  The problem - I cannot sign in through the "Sign In" section in the upper right corner.  The pop-up appears but claims the e-mail and/or password is incorrect.  Here's the funny thing - I can sign in to my Norton account using the same information via any web browser.

Help? :)