Same signature here — adding our team in case it helps Apple batch the server-side fix. Team ID: 2L9BRR2X97 Bundle ID (primary App ID): com.niman.watagumo Feedback: FB24584055 Device: iPhone, iOS 26.6 (23G71), TestFlight build Sign in with Apple has never succeeded for this App ID — zero successful authorizations across an entire sysdiagnose containing 33 attempts. The sheet renders, Face ID succeeds, the user confirms name + email, then "Sign Up Not Completed"; the app receives ASAuthorizationError 1000. akd shows the same -6003 as everyone else in this thread: akd [siwa] Fetching developer team for client with ID: akd [siwa] Encountered error while fetching developer team: Error Domain=AKSQLError Code=-6003 akd [siwa] No applications were found with the provided Client ID: akd [siwa] Application has no shared credentials akd [siwa] Using personal credential state - 2, error - AKAuthenticationError Code=-7074 akd Adding passwordlessToken: NO, and idmsDataToken: NO, to auth-params akd Performing SRP request with context -> HTTP 200 akd (second SRP request) -> HTTP 200 akd AppleIDAuthSupport: setError: 2:M2 missing (bad password) akd Invalid/missing value for key acname / ut / authType / primary email vetted: (null) akd SRP authentication with server failed! Domain=com.apple.AppleIDAuthSupport Code=2 akd [siwa] Error performing auth request: AKAuthenticationError Code=-7003 / -7034 App Authorization failed: AKAuthenticationError Code=-7034 Both SRP requests return HTTP 200, but the server proof (M2) is absent and every account field comes back null. The "bad password" wording is misleading — the account password is definitely correct (removing Activation Lock with the same password succeeded). Ruled out on our side: entitlement com.apple.developer.applesignin = ["Default"] present in the signed binary's embedded provisioning profile; APPLE_ID_AUTH + PRIMARY_APP_CONSENT confirmed via the App Store Connect API; capability deleted and re-created, then rebuilt and re-signed; Team ID consistent across App ID, profile and binary; HSA2 account; Apple Account signed out of the device and back in; Screen Time restrictions all set to Allow; nonce SHA-256 verified against seven test vectors. Requesting the same server-side registration repair that was applied to GW7XA5CX69 and FRL3DTJQ62. Happy to provide a fresh sysdiagnose, the entitlements dump, or the binary on request.