Joe, I imagine that you've found a solution, but for posterity, I had the same issue. As Jonathon mentioned, make sure that the webview is connected to the code, as shown in Nick's tutorial: http://forums.tumult.com/t/the-hype-to-swift-3-0-tutorial-series-is-finished/8516
But having done that, I was still seeing a blank screen. So I re-exported the Hype project, deleted the older content that wasn't working from then reimported new into my Xcode project, and things suddenly started working. Not sure what the issue was and I'm still having a problem with an older Xcode project that was working, but for the moment, all the matters is that I can make something work now.