I'm with you guys. I have one month subscription in-app purchase, initial purchase works OK, auto-renewals works OK, but when all automatic renewals are proceeded, so it becomes actually "expired" subscription, then when I try to renew this subscription manually it sometimes gives me this error (and sometimes doesn't!) in SKPaymentTransactionObserver . func paymentQueue(_ queue: SKPaymentQueue, updatedTransactions transactions: [SKPaymentTransaction]) (lldb) po transactions[0].error ▿ Optional<Error> &#9;- some : Error Domain=SKErrorDomain Code=0 "An unknown error occurred" UserInfo={NSLocalizedDescription=An unknown error occurred, NSUnderlyingError=0x28216fed0 {Error Domain=ASDErrorDomain Code=500 "Unhandled exception" UserInfo={NSUnderlyingError=0x28216e460 {Error Domain=AMSErrorDomain Code=301 "Invalid Status Code" UserInfo={NSLocalizedDescription=Invalid Status Code, NSLocalizedFailureReason=The response has an invalid status code}}, NSLocalizedFailureReason=An unknown error occurred, NSLocalizedDescription=Unhandled exception}}}

Decided to update my toolchains today. Moved from Xcode 12.0 to 12.2 and now I'm experiencing the same issue. Very frustrating. The same "Cannot create Swift scratch context (couldn't create a ClangImporter)" for Version 12.2 (12B45b) and Version 12.3 (12C33).

Finally fixed this by changing name of my Xcode app from Xcode(12.3) to Xcode&#92;&#95;12&#92;&#95;3 so it seems that the problem was in characters that needs to be escaped. So if anyone has brackets or quotas in their path to Xcode, check this.