I’ve hit a snag on uploading my app to the App Store from Swift Playgrounds that I don’t know how to resolve. I am writing/uploading my app using only Swift Playgrounds on my iPad; no XCode at all. In the App Settings screen I entered my Bundle ID metadata and then uploaded my app. The subsequent screens indicate that the app "Upload Succeeded". When I check the app info in App Store Connect, the Bundle ID there shows it as duplicated. Then I got the email from Apple about the invalid code signature identifier with a 25+ alphanumeric string appended to my Bundle ID. I have no idea where this came from. As far as I know, I have no means of creating nor reporting such a value. It seems to me that Apple applied this. Is there is some folder that I need to have in my source files in order to deal with that tidbit of metadata?