Finally fixed this by changing name of my Xcode app from Xcode(12.3) to Xcode\_12\_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.

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).

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}}}