Same failure signature, another affected team — Team PAG2G4C6RW / kr.co.fordex.app Adding our team to this thread. The signature matches this thread exactly, and Sign in with Apple has never once succeeded for this App ID. Team ID: PAG2G4C6RW Bundle ID / App ID: kr.co.fordex.app (App ID resource B9D9577PS9, platform UNIVERSAL, seedId PAG2G4C6RW) App Store Connect app: 6805027868 ("FORDEX") Feedback Assistant: FB24616817 App ID registration history App ID created and Sign in with Apple enabled on 2026-08-21 via the App Store Connect API. Capability APPLE_ID_AUTH with APPLE_ID_AUTH_APP_CONSENT = PRIMARY_APP_CONSENT (single option; no grouping, no secondary/relay App ID, no wildcard App IDs in the team). Distribution provisioning profile Q275S5WWFS, created 2026-08-21, IOS_APP_STORE, state ACTIVE, expires 2027-08-21. It is the profile embedded in the failing build. Entitlement com.apple.developer.applesignin = ["Default"] is present both in the embedded provisioning profile and in the signed Mach-O of the IPA. The app has zero app extensions. No pending agreements; App Store Connect reads and writes both succeed. Devices and builds TestFlight build 7 of version 1.0.1 (build ID d242ff51-f376-4541-8fbb-cff072549083), uploaded 2026-08-31. Reproduced on iPhone 16 Pro, iOS 26.6.1 (developer's own device, video recorded). Independently reproduced by App Review on iPad Air 11-inch (M3), iPadOS 26.6, on 2026-09-01, which caused the submission to be rejected. Symptom The Sign in with Apple sheet is presented normally and shows the correct app name. Face ID succeeds. The sheet then shows "Sign Up Not Completed". The app receives ASAuthorizationError.canceled (1001) with empty userInfo and no underlying error. Zero requests reach our backend. Our auth database has never contained a single Apple identity row for the entire lifetime of the project (all other providers work normally). Settings > Apple Account > Sign in with Apple does not list this app on the device, i.e. no credential was ever issued. Public authorize endpoint probe A GET to https://appleid.apple.com/auth/authorize with client_id=kr.co.fordex.app returns HTTP 200 whose body contains errorCode":"invalid_client" / errorMessage":"Invalid client." (observed 2026-09-02 ~02:45 UTC). I want to be precise about the limits of this datapoint: this endpoint normally expects a Services ID, and I was not able to obtain a control result for a known-good native App ID because Apple's edge began returning HTTP 403 to my host after the first request. I am reporting it only because DanCue's resolution note above states that the same endpoint returned invalid_client for their client_id continuously during the outage and stopped once the server-side registration was repaired. What we have deliberately NOT done Per this thread, we have not toggled the capability off/on, not regenerated profiles or certificates, and not changed the bundle ID, since those were reported ineffective by every team here. No client-side change has been made. Request Could Apple please re-register / repair the Sign in with Apple server-side registration for Team ID PAG2G4C6RW, App ID kr.co.fordex.app? Our App Store submission is currently rejected solely because of this, and there is no client-side change available to us that would fix it. I will attach a sysdiagnose with the Accounts and AuthKit logging profile to FB24616817 and will report back here as soon as sign-in completes on device.