SwiftyDropbox assertion error

Hello,

I've been trying the preview of SwiftyDropbox, and while it has been working very well previously, I'm now getting a runtime error in the deserialize() method of the ListFolderFooterSerializer class: "assertion failed: Type error deserializing: file /Files.swift, line 352 (lldb)"

In my latest attempt to recreate the error, I've set up an Xcode workspace & project exactly as detailed in the Swift SDK 2.0 blog post (https://blogs.dropbox.com/developers/2015/05/try-out-swiftydropbox-the-new-swift-sdk-for-dropbox-api-v2/) and the same error occurs. The sample code which causes the runtime error is also directly from the example in the blog post where it attempts to retrieve and display app folder contents.

// List folder
client.filesListFolder(path: "").response { response, error in
    if let result = response {
        println("Folder contents:")
        for entry in result.entries {
            println(entry.name)
        }
    } else {
        println("Error: \(error!)")
    }
}

It's strange because all of my testing with this API has gone fine until this week and the runtime error manifests in each of my test apps. I understand it could be a configuration issue with my DB account, but I'm not sure how to go about isolating it. Has anyone else run into this error? Are there any other troubleshooting steps I should try? Thanks!