RevenueCat在 Google 采购和 Apple 沙盒中使用一切正常。但是在生产模式（iOS 14 和 Xcode 12）下，我在尝试购买时遇到以下错误。
[Purchases] - DEBUG: PaymentQueue removedTransaction: agfpro3m (null) ((null) Error Domain=SKErrorDomain Code=0 "An unknown error occurred" UserInfo={NSLocalizedDescription=An unknown error occurred, NSUnderlyingError=0x282604db0 {Error Domain=ASDErrorDomain Code=500 "Unhandled exception" UserInfo={NSUnderlyingError=0x282604c60 {Error Domain=AMSErrorDomain Code=100 "Authentication Failed" UserInfo={NSLocalizedFailureReason=The verify credentials call failed., NSLocalizedDescription=Authentication Failed, NSUnderlyingError=0x2826048a0 {Error Domain=AMSErrorDomain Code=0 "Authentication Failed" UserInfo=0x283c84380 (not displayed)}}}, NSLocalizedFailureReason=An unknown error occurred, NSLocalizedDescription=Unhandled exception}}}) {
NSLocalizedDescription = "An unknown error occurred";
NSUnderlyingError = "Error Domain=ASDErrorDomain Code=500 \"Unhandled exception\" UserInfo={NSUnderlyingError=0x282604c60 {Error Domain=AMSErrorDomain …