iTunes account creation not allowed when trying to test In-App Purchases

Question

I have an app in the App Store and I want to test in-app purchases. I followed the steps described on the Apple website but I\'m facing some problems.

When I try to

Answer 1

The top answer is correct, but if you're still having the issue:

Make sure that the app you're trying to log into is a development app installed with Xcode. You'll get the same error if your version was installed from the App Store.

(I got confused because I have 5 versions of almost the same app.)