Cool idea. But I do tend to agree with the last comment. Perhaps have the nav and most recent within the topbarmenuwrapper, then have a secondary fix section below the content.
Is it a blank page or a 404 error? Where does the WP install exist in the root or in a subdirectory? And lastly, what’s the site address for others to look at?
It’s very nice, clean and simple. I’m sure your knowledge is vastly beyond mine, but the only criticism I can offer might be that the space between the main content and the sidebar seems excessive. I think it’s great other than that minor detail.