OK, I did some digging and found out the scenario that causes the error.
I used Chrome’s “Inspect Element” feature and discovered that the post was styled as an aside. I did that trying to format just a small section of the post, but the editor formats the whole post as whatever (standard, aside, status, etc) format you select, instead of what is highlighted.
I changed the format back to “Standard” and the error is gone – all the page is generated properly.
I need to check your video list to see how to format sections of a post, since the editor does not display available theme options in the “Format” menu.
Hopefully this might help you on the next revision of Reloaded! I am really enjoying this theme, and can’t wait to explore the others. 🙂