Apple blocked testing in-app purchases…
Here is the link to the release notes
https://developer.apple.com/library/content/releasenotes/DeveloperTools/RN-Xcode/Chapters/Introduction.html#//apple_ref/doc/uid/TP40001051-CH1-SW578
See: iOS Simulator section
StoreKit (In-App purchases) will not work in the Simulator. 13962338
Very sad…