Showtime subscription through Apple TV+ bundle not working
I subscribe to Showtime and Paramount+ through the Apple TV+ bundle. Normally I watch Showtime shows through the Apple TV app, but I haven't in a while. Today I was unable to access any Showtime content through the Apple TV+ app (the button under Watch Now for Showtime). I don't have a separate Showtime sign in, so I can't access it through the regular Showtime app. I checked in my Apple TV+ Account and it says my Paramount+ and Showtime subscriptions are active. I've even looked on Paramount+, and they tell me to access Showtime through Apple TV+. I've tried everything I can think of for the past 2 hrs, but I can't figure out how to access my paid Showtime subscription. What can I do to watch Showtime?
MacBook Air 13″, macOS 10.14