I kept the #Preview macro by changing it to this, but with warnings about losing global actor 'MainActor': #Preview { @MainActor in ContentView() .frame(minWidth: 500, minHeight: 500) .modelContainer(previewContainer) }

Me too, but a simple app using Swift Playgrounds on iPad. I sent a message to support about this describing what I was doing, and a copy of the error and got the response: “We're unable to determine the nature of your request. Please reply to this email with clarification”. This was the error I get back in email: ITMS-90334: Invalid Code Signature Identifier - The identifier 'Johnboxgame-numbers_and_letters_that_forums_thinks_are_offensive' in your code signature for 'Johnboxgame' must match its Bundle Identifier 'Johnboxgame' WIth the iPad app there’s not really much I can control as far as what goes in the bundle, and it’s worked in the past.

The actual error I get from App Store Connect is not permitted. 🙄

FWIW, I’m using an Intel Mac and it’s failing. Thanks @danlloydjones for a workaround.