Apple makes some changes to TestFlight service improving test team management. New interfaces will allow to quickly navigate through testers and check their engagement.
Client apps update to target inability to accept invitation codes.
Specifically, an issue preventing users from accepting an invitation to test a beta app via redemption code was resolved. Testers on iOS 17.1, iPadOS 17.1, or later will need to use this latest version of TestFlight in order to accept an invitation via redemption code.Apple Developer