so the response last time was:
["WA_Store_Cart_USPS_FullResponse"]=> &string(182) "80040b1aAPI Authorization failure. RateV4 is not a valid API name for this protocol. UspsCom:oAuth "
But this time it is different:
["WA_Store_Cart_USPS_FullResponse"]=> &string(179) "80040b1aAuthorization failure. You are not authorized to connect to this server.
this means that USPS needs to update your account to allow it to connect to the production server