Same issue here, identical signature. Team ID: 54D736559Z Bundle ID: com.puzzlelogic.nonogram App ID: HU7X7Q39JR The sheet presents correctly, Face ID succeeds, scopes are selected, then "Sign Up Not Completed" and the delegate gets ASAuthorizationError.canceled (1001) with empty userInfo. No credential is issued, so nothing reaches our backend. akd logs match this thread exactly: Encountered error while fetching developer team: Error Domain=AKSQLError Code=-6003 No applications were found with the provided Client ID: com.puzzlelogic.nonogram AppleIDAuthSupport: setError: 2:M2 missing (bad password) SRP authentication with server failed! Code=2 AKRemoteViewController did complete with authorization (null) (error: NSLocalizedDescription=Invalid client., NSUnderlyingError=AKAuthenticationServerError Code=-24000) ... Domain=AKAuthenticationError Code=-7003 Client side is verified correct: com.apple.developer.applesignin = ["Default"] present in the signed binary on device (codesign -d --entitlements) APPLE_ID_AUTH with PRIMARY_APP_CONSENT confirmed via the App Store Connect API (GET /v1/bundleIds/{id}/bundleIdCapabilities) Entitlement also present in the App Store provisioning profile Bundle ID consistent across Info.plist, profile and App ID Ruled out: the same Apple Account on the same device signs in with Apple successfully to another team's App Store app immediately before and after a failing attempt. Also reproduces with a second Apple Account on a simulator, on both Wi-Fi and cellular, and in debug and profile builds. Apple system status showed Sign in with Apple as OK throughout. Device: iPhone 15 Pro Max, iOS 26.6.1 (23G83). Xcode 26.3. Feedback filed: FB24669750 Could our team's App ID registration be re-provisioned server-side as was done for GW7XA5CX69 and FRL3DTJQ62 earlier in this thread? Happy to provide a sysdiagnose.