After 10 rejections, I’m trying to get some help here. In my latest app, I’ve a $5/month subscription. Everything works fine when I compile using Xcode or distribute to my beta testers with TestFlight.
But when I submit the build to Apple, they alway (10 times!!!) reject it because of a “Unknown error.” after successful purchase.
Here is the message they send every time:
Guideline 2.1 - Performance - App Completeness
An error message is produced when attempting to complete the in-app purchase transaction.
Please see attached screenshot(s) for details.
Thanks for your help!