I'm using and getting the same error (no cancel event is received in the asynchronous sequence Transaction.updates, but subscription start/renewal events are received) at least in the sandbox environment. Is there any solution to this other than adding a timer and periodically querying the latest transactions (for example via Transaction.currentEntitlements) or using your own backend?

I have the same problem (constantly asks to introduce access token, I enter it and again appears a token input window). Moreover, token is valid, I successfully login in with it in Xcode on another MacBook. If this is important, I have MacBook Pro M1 Max, MacOS 12.6, Xcode 14.0.1

I have the same