Same signature here — adding our Team ID so it can be included in the server-side fix.
Team ID: WCCJWRTJZU
Bundle ID: app.myquota.ios (App Store Connect app 6789743758)
Feedback Assistant: FB24867593
Sign in with Apple enabled on the App ID on 2026-07-24 (APPLE_ID_AUTH with PRIMARY_APP_CONSENT, read back through the App Store Connect API on 2026-09-20). The account was converted from Individual to Organization on 2026-09-10 (same Team ID) and the membership was inactive between 2026-09-05 and 2026-09-10.
Symptom: the native sheet renders, the user authenticates with Face ID, then the sheet shows "Sign Up Not Completed" (Spanish devices: "Registro no completado") and ASAuthorizationError.canceled (1001) is returned with an empty userInfo. Same result with "Share My Email" and "Hide My Email". Reproduced on TestFlight builds 1387 and 1388 on several iPhones with real users' Apple IDs, and by App Review on an iPad Air (iPadOS 26.6.2).
Ruled out on our side: com.apple.developer.applesignin = ["Default"] present and wired to the target, automatic cloud signing, bundle ID equal to the audience our backend validates, and Google Sign-In completing normally through the same plugin, binary, device, network and backend.
App Review rejected the app under 2.1(a) on 2026-09-14 for this exact failure and stated they cannot provide technical assistance. Developer Program Support case 102963412403 (opened 2026-09-14) has had no engineer reply so far.
Could App ID app.myquota.ios be included in the re-provisioning? Happy to provide akd logs or a ptxid on request.