Thanks, Quinn! You were right, it reproduces. I created a new project from Xcode's standard iOS App template (SwiftUI, no third-party code), set the same bundle ID, automatic signing with the same team, version 0.0.1 (1), and added a 1024 app icon. Then Product > Archive (Any iOS Device, arm64) > Distribute App > App Store Connect. The archive succeeds, but the upload fails with the same error: "Invalid Signature. Code failed to satisfy specified code requirement(s). The file at path "SignTest.app/SignTest" is not properly signed. [...]" (ID: ULS7ECZNAN4F3FBZGYCMKFENX4) So it doesn't seem related to Godot. Some context that might help: This is a new individual developer account (Team ID ALUWFZZ6Z9). Certificates in my account: one "Development" and one "Distribution Managed" (cloud-managed), both created by Xcode. Xcode 27.1 (27A9275), macOS 27.0.1 (26A434), Apple silicon Mac. Earlier I also set up Xcode Cloud for this app, but I'm uploading from Xcode Organizer on my Mac. What should I check next? Thanks again!