Our app has the same issue. TestFlight prompts: “Couldn't Load Apps TestFlight is currently unavailable. Try again.”
kugouApp
Users receive reputation points by contributing quality content to the forums.
Posts include post and replies published on the forums.
Post authors can mark replies as Accepted to indicate successful solutions.
Apple Developer Forums admins can mark replies as Apple Recommended to indicate an approved solution
Post
Replies
Boosts
Views
Activity
Have you found a solution？I had same problem
All major Chinese top music players have this bug