Since June 27, all new TestFlight builds for my app show Complete status but cannot be installed by any tester. Error is "The requested app is not available or doesn't exist." Adding testers to the build also fails with "There was an error processing your request." This affects all builds regardless of version number. Support case open for 5+ days with no resolution.

I activated the Paid Apps Agreement today along with banking and tax information. My app uses react-native-purchases (RevenueCat) with StoreKit 2. When tapping purchase buttons in TestFlight I still get "Product not available - Could not load this product." Products show "Waiting for Review" in App Store Connect. Sandbox tester is configured. Is there a delay after activating the Paid Apps Agreement before sandbox purchases work? How long should I expect to wait?