2014-10-21 07:12:51.005 BlogReader[3645:5545886] Failed to instantiate the default view controller for UIMainStoryboardF

In your app's settings:

Settings > "General" tab > Main Interface (under "Deployment Info" section)

Have you deleted everything in the "Main Interface" box? If not, it'll probably be attempting to instantiate your original view controller, which is obviously missing at this point.

Hopefully this helps!

I just did what you suggested. The error went away - which is progress - but the screen remains black. No content shows up. Any idea why that might happen?

Awesome, that's good progress. My guess is that your blank screen problem occuring is because you haven't given the app any storyboard to use (which is what you just deleted in that "Main Interface" text box), so when it loads the app, the app doesn't know where to start.

Your best (fastest) solution would probably be to go to the current video that you're working on and click on "Downloads" below the video, then find the "Project Files" file that contains the app in its current state (and sometimes a little more) in the course. Then you can just start from where they are at, or perhaps even go back further and download the app in an earlier version from a different video if you want to start from the ground up.

Let me know if that doesn't work well for you and I can help you walk through and clean out the Single View app for use if you'd really like to do that.

That's a good idea. I wasn't aware that you could download the files for the project up to the point of the current video. That will definitely help. It sucks not being able to do it all from scratch - but Xcode 6 doesn't even have an empty app option - so I'm not too concerned. I suppose I'm just learning anyways - but it sucks to "build an app" that someone else built haha. Oh well - this helps a ton. I know I've done everything that he's done - so I can take solace in that, I suppose :).

Thanks.

I does take some of the fun out of it when you're trying to follow along, for sure. I was using Xcode 6 Beta's while I was taking many of those courses, and I know for sure it didn't have an "Empty Application" then. However, when I checked just now if you go:

New Project > iOS menu > Other > "Empty"

That is an empty application, but it is completely empty, which isn't terribly useful either; at least for what you're doing in these tutorials.

Best of luck!

Also, I'm going to copy and paste the answer that solved your initial problem into an actual answer so you can mark it "Solved" in case anyone has a similar problem.