Today a large swath of users encountered "An unknown error occurred" during the payment process at our Apple Store applications, which is very unusual, causing us to have my hands full, and we consulting with other developers had also encountered the same problem, I have not seen the relevant information on the Internet, please tell what is the cause and how we should avoid similar problems.
iOS "An unknown error occurred" when in-app-purchase
Hello,
There was a system issue issue affecting in-app purchases earlier this week. See here for details:
https://developer.apple.com/system-status/
The issues you're describing likely stem from that. But if the issue persists, please file a feedback ticket so we can investigate. Provide as much information as you can, and post the FB number in this thread. You can file a ticket here: