I'm experiencing a persistent issue where my app uploads successfully to TestFlight and appears in App Store Connect, but internal testers (including myself) receive the following error when attempting to install: "Could not install xxxxxxxxx. The requested app is not available or doesn't exist." What works: The build archives and exports successfully via Xcode (local build, Release configuration) The IPA uploads to App Store Connect without errors via eas submit The build appears in TestFlight and passes processing I can add the build to my Internal Testing group Testers receive the TestFlight notification and can see the app What fails: When any tester taps "Install" or "Update," the download begins briefly, then fails with the "not available or doesn't exist" error This affects all internal testers on the account, not just one device Troubleshooting already completed: Verified code signing is correct: Release configuration uses CODE_SIGN_STYLE = Manual, CODE_SIGN_IDENTITY = "iPhone Distribution", with a valid App Store distribution provisioning profile (UUID: 39bc4c63-bc64-403a-a2a6-6737b3d33115) 2. Distribution certificate is valid: Serial 4838CD7571DE5361B98A5FB2F769F74D, not expired (expires 2027-04-16) 3. Regenerated provisioning profile via EAS credentials, removed stale profiles, and rebuilt — same result 4. Incremented build numbers correctly across multiple submissions (3004 → 3005 → 3006) 5. Previously resolved a signing misconfiguration (build 3005 was incorrectly signed with "Apple Development" instead of "iPhone Distribution" due to expo prebuild reverting settings) — this was corrected for build 3006, but the install error persists 6. Confirmed the build is not stuck in processing — it shows as ready for testing in App Store Connect 7. Tested on multiple devices running current iOS versions 8. Cleared TestFlight app cache and reinstalled TestFlight on test devices Why I believe this is a server-side issue: Multiple developers in the Apple Developer Forums have reported the identical symptom — valid builds that upload and process correctly but fail to install with this exact error message. In those cases, Apple Support resolved the issue on their end within 48 hours with no action required from the developer. The signing, provisioning, and build configuration were not the cause. This one is very specific to what I am dealing with https://developer.apple.com/forums/thread/778597 One developer stated you fixed it on your side, without any real reasoning which also leads me to believe this is not something I can fix on my end https://developer.apple.com/forums/thread/778597?answerId=884241022#884241022 I've exhausted all client-side troubleshooting and believe this may require intervention on Apple's side. Has anyone been able to fix this on their end and not only when App Development called? I went through tons of the feedback and tried it all and it doesn't seem to be fixed. It's been a month or so like this. I can't get any info on who to call. I sent in a report to feedback assistant and through app developer support