iOS App Integration - What does the Failure case signify for validationStatus and authStatus?

I am integrating Payeezy into an iOS app via your SDK. Currently, when we try to run a test payment, the `validationStatus` property and the `authStatus` property come back as `Failure` on the `FDPaymentResponse` object. In looking at the `transStatusMessage` property, all it says is `error`.

What does the `Failure` case for `validationStatus` signify? And what does the `Failure` case for `authStatus` signify?