Hello, I am experiencing an issue with TestFlight that I have not been able to resolve. Problem description One day, I suddenly became unable to update our app from TestFlight using my tester account. Assuming it might be a permission issue, I removed my tester access for the app and then re-invited the same Apple ID. After doing this, the situation became worse: I can no longer install the app at all via TestFlight. What I have already tried I have attempted all of the following multiple times: Removing and re-adding tester access in TestFlight Deleting and reinstalling the TestFlight app Installing the app via a new invitation link Installing the app via an invitation code None of these attempts worked. Error message Every attempt results in the same error message: Unable to Load App This invitation is not associated with the Apple Account you’re currently signed in with (me [at] example [dot] com). Sign in to TestFlight with the original Apple Account (me [at] example [dot] com) or ask the developer for a new invitation. Why this seems incorrect The error message suggests that the Apple ID signed into TestFlight does not match the invited account. However, I am using the exact same Apple ID for: TestFlight Apple ID (device iCloud account) App Store There is no account mismatch. Everything is logged in with the same Apple ID (me [at] example [dot] com). At this point, I am completely blocked and cannot proceed with testing or updates. Question Is there a known issue where removing and re-adding tester access can permanently invalidate an Apple ID for a specific TestFlight app? Is there any way to reset or clear the tester state for an Apple ID on Apple’s side? Any guidance or insight would be greatly appreciated. Thank you.