The only thing I can think of at this point is the next time you see the pop-up, log in with your Apple ID and then log out.
Thanks. I opened iTunes, logged out, and had an iTunes radio station play for many hours with no issues.
Actually, I haven't used the iTunes store in close to ten years, because I prefer to buy higher-resolution AIFF music files which Apple has shown no interest in offering. Also, it looks like we don't even have to be logged on to see which of our favorite podcasts have been updated.
Thanks again for the help in solving this.
