We are having issues with the In App Provisioning process, in particular during the last phase of the process, when the activationData, encryptedPassData, ephemeralPublicKey are passed to the PKAddPaymentPassRequest. We double-checked with our Issuer Host that activationData was required as plain string not encoded in Base64 in the previous version of PassKit, while now, as stated in the current Getting Started docs (9.5), all of the three objects are required in a Base64 format. Currently, even after encoding the activationData in Base64, we are still receiving an error after calling handler’s method with an PKPassKitError with code equals 2 and a localizedDescription of: “The operation couldn’t be completed”. To double check that there wasn't issues within our code, we also tried to add the same Card by manually add it through Apple Wallet application, but the same Alert error appear. Thanks for your support. Regards