I also still getting the same error from sandbox
"x": "Invalid response: Client error: GET https://api.storekit-sandbox.itunes.apple.com/inApps/v1/transactions/2000000632845273
resulted in a 401 Unauthorized
response",
while for production url
"x": "Invalid response: Client error: GET https://api.storekit.itunes.apple.com/inApps/v1/transactions/2000000632845273
resulted in a 404 Not Found
response:\n{"errorCode":4040010,"errorMessage":"Transaction id not found."}\n",