Norton Account: Sign In - Error

I successfully upgraded today to Norton Security 2015. However, when I try to "sign in" via the Norton Security panel, I receive the following message:

X Server Error:  We're working to resolve an issue that prevents us from completing your request. Try again later.(-2147024891)

I am absolutely certain that I'm using my correct user ID and password for my Norton Account, as I am able to sign into my Norton Account via the Web, but not via the Norton Security panel opened with the icon in my taskbar tray.

Solution???