Well, based on what we're seeing, it appears to be a problem with your index page. There might be an access log that can tell you what it's doing.
I noticed that the index.html page was returned as an error page (as if the page wasn't found).
So, what I'd first do is find what the right index page should be for the app you're running. (i didn't look hard enough). But you might put up a quick generic index.html page to see if it is served properly.
Wholly - IS NOT MY PROMO CODE. Even worse, I don't get any credit for it. Use WhollyMindless for full credit. I'm really disappointed in someone.