iOS App Store IAP error: "There's no information available for In-App Purchases. Try again later."

[SIG.]

I've just released my app to the Apple App Store. When I purchase my IAP, I get this "no information available" iOS error, code 21105, which Apple says means that "the receipt server is not currently available."

Could Apple's server really be down?

@Dan I've asked before, but this is really important: Does GMS2's IAP system in the stable release (not the newest extensions/system) not work anymore on Apple's side?

Edit: the game itself is reporting a response of iap_failed

 

[Zixtix]

I am also seeing this error, although this Stack Overflow thread suggests that it may be an issue with Apple's sandbox environment: https://stackoverflow.com/questions...le-for-in-app-purchases-try-again-later-21105

 

[SIG.]

I eventually determined that any TestFlight user who had purchased the IAP or used a promotion code for the IAP with the TestFlight version would get this error when trying to purchase or use a code in the released app.