iOS TestFlight Deployment Debugging: From SSO Errors to Entitlements Mismatch
Here are the errors repeatedly encountered while uploading multiple Flutter apps to TestFlight. 1. Apple Sign-In Error 1000 SignInWithAppleAuthorizationException(AuthorizationErrorCode.unknown, The operation couldn't be completed. (com.apple.AuthenticationServices.AuthorizationError error 1000.)) Cause This occurs because the Sign in with Apple capability is missing from Runner.entitlements. Solution Both places must be configured. 1. ios/Runner/Runner.entitlements <key>com.apple.developer.applesignin</key> <array> <string>Default</string> </array> 2. Apple Developer Console developer.apple.com -> Identifiers -> Select app Bundle ID -> Check Sign in with Apple -> Save ...