Hi,
All of my TestFlight builds expired themselves and I can't submit any new builds for external testing. The general error message I see is "There was an error processing your request. Please try again later." and looking at the console I see a more specific error "API Response Error: TF_BETA_APP_REVIEW_RESPONSE".
I've sent a couple of emails to support but I haven't heard anything back yet.
What's going on with App Store Connect these days? It's so unreliable.