Since last week while testing our in-app purchases, I've had a lot of trouble with the sandbox account and StoreKit. I often had to wait for a minute or longer to get a response from the app store, or timed out before that. This occurs within the app but also when managing subscriptions under deverloper options -> sandbox account -> subscriptions.
Here is one of the error responses:
<SKPaymentQueue: 0x106ba06f0>: Payment completed with error: Error Domain=ASDErrorDomain Code=530 "(null)" UserInfo={client-environment-type=Sandbox, storefront-country-code=CHE, NSUnderlyingError=0x106922010 {Error Domain=AMSErrorDomain Code=100 "Authentication Failed The authentication failed."
The task I'm trying to accomplish is change our third party verification and subscription management server. Because of this I can sadly not use StoreKit2 and the transaction manager within Xcode, which I enjoyed a lot in the past. Working with sandbox accounts is very frustrating like this and I'm not confident to release our app with new subscription management until I can properly test this.
I've seen similar topics in this forum and so I want to ask: What might be the cause for these problems and when can we expect a stable verison again?