Cannot Log In to Norton Wifi Privacy

I can sign in to my Norton Account from a web browser.  I just purchased Norton Wifi Privacy but I cannot sign in.  I enter my credentials and it takes me back to the sign in screen.  I am running WIndows 10 (x64).  Assistance would be appreciated.

Have you just installed Norton Wifi Privacy, NWP? Have you been able to log in before?

Have you restarted your computer?