Same issue here, still unresolved. Adding our details so DTS can correlate. Team ID: KT9P85VC2P Bundle ID / Client ID: com.cvergarabah.piya Feedback: FB24607596 (open, full sysdiagnose attached), FB24569985 (original, closed) Same signature: the native sheet shows "Sign Up Not Completed" after Face ID confirmation, and the delegate receives ASAuthorizationError 1000/1001 with no credential. AuthKit logs from the sysdiagnose: AKSQLError -6003 "No applications were found with the provided Client ID" AppleIDAuthSupport Code=2 "M2 missing (bad password)" AKAuthenticationServerError -24000 Verified: APPLE_ID_AUTH with PRIMARY_APP_CONSENT on the App ID; com.apple.developer.applesignin = ["Default"] in both the signed binary and the provisioning profile. Reproduced on two iPhones (iOS 18.7.8 and 26.6) with two different Apple Accounts. Google Sign-In works end to end in the same build. This is blocking our first App Store submission. @Paris X Pinkney, could you please check whether our team's Sign in with Apple registration can be repaired like the others in this thread? Happy to provide fresh logs or a new reproduction at any time. Thank you!