Same signature here, still failing as of today. Team ID: CKR4VUYMCD Bundle ID / client_id: com.packandpeek.app Feedback: FB24739690 (sysdiagnose with the Accounts/AuthKit profile attached) Devices: iPhone 15 Pro Max and a brand-new iPhone 17, iOS 26.6, with two different Apple Accounts (one that had never used the app) Distribution: TestFlight Capability enabled 10 August 2026. Native sheet renders, biometric completes, then "Sign Up Not Completed"; delegate receives ASAuthorizationError 1001 with empty userInfo only after dismissal; no credential, no request ever reaches our backend. Verified before posting: com.apple.developer.applesignin = (Default) in the signed binary's code signature and in embedded.mobileprovision; App ID capability via ASC API is APPLE_ID_AUTH with APPLE_ID_AUTH_APP_CONSENT = PRIMARY_APP_CONSENT; single App ID in the team, no wildcard; agreements accepted. Tried: portal re-save, delete/re-create of the capability via API, new provisioning profile generated after the re-registration with a new build signed against it, replacing our Capacitor plugin with a first-party ASAuthorizationController implementation identical to Apple's sample, Share My Email and Hide My Email, device restarts, and a month of waiting. No change. This is blocking our App Store release - we were rejected under Guideline 4.8 and Sign in with Apple is the required remedy. @Paris X Pinkney, could Team ID CKR4VUYMCD be added to the server-side registration fix? Happy to provide anything else needed.