Sorry, how would using the @Observable macro help in this case? As I mentioned in my post, the InAppPurchaseManager works perfectly in a fresh Xcode project with a minimal setup.

I experienced the same problem on macOS Sequoia 15.7.3 (24G419). I did it this way: pickerViewController.view.setFrameSize(...)

Sadly, this is still present in Xcode Version 16.3 (16E140).

I have filed a feedback report, FB16341774. I tried your steps and it works but the errors come back after a little while, whilst working on the project.

Updating the macOS to 15.2 (24C101) fixes the problem. It works on first try.

I have the same problem as I am using an M4 Pro Mac. It worked when I first got the computer but after a little while, it stopped working. I've just updated to Xcode Version 16.2 (16C5032a) on macOS 15.1.1 (24B2091) and it is still not working.

I see. I intend to integrate my app development workflow with Xcode Cloud and/or with a third-party CI/CD. I have not done it yet but would it work straightaway or do I need to do something about it in advance?

I had these problem when I was using Xcode Version 15.3 (15E204a). It turns out that they have fixed it but then Apple has apparently changed something in their backend. There's an opened issue about the new problems, Malformed Framework response from App Store Connect. The suggestion for the meantime is to use Xcode Version 15.2 (15C500b).