Apple+ spinning wheel on Samsung smart TV

Big problem with Apple+. I stream via Samsung smart TV. No problem for one year. Now, when I click on Apple+ on TV, all I get is the turning wheel. Other apps (Netflix, etc.) work fine. I refreshed my WiFi, also reset TV network settings. Nothing but spinning wheel. Streaming Apple+ via my PC is fine. So, problem must be with TV. Can't figure it out.

[Re-Titled by Moderator]