"This episode is temporarily unavailable" error in Apple Podcasts

I have been listening to MANY podcasts in Apple Podcasts since the app was released. Starting about 6 weeks ago, the Check Your Balances podcast (a small operation) stopped playing. I get the following error message "This episode from Check Your Balances is temporarily unavailable. Try again later." I contacted the podcasters and they have no idea what the problem is. They can't recreate it. Yesterday I had this same error occur with a second podcast, Vocal Fries. These are not big media companies. Anyone have this problem? Searching the web and here has found no solutions.

I'm running iOS 17.4.1 on iPhone 13 Pro.