404 Error For "/Author" Caused By Schema.org or bbPress?

I'm getting a 404 error because there is some schema.org information
pointing to a page that does not exist. The 404 error is for:
http://livingwithacatheter.com/author/

I know that a page like that does not exist by itself, rather it is only valid when there is an author name after the trailing /. But for some reason, a newly created user on my site generated the following code on their forum user page (http://livingwithacatheter.com/forums/user/chris/), which contains the link to http://livingwithacatheter.com/author/:

<span class="entry-author" itemprop="author" itemscope="itemscope" itemtype="http://schema.org/Person"><a href="http://livingwithacatheter.com/author/" class="entry-author-link" itemprop="url" rel="author"><span class="entry-author-name" itemprop="name"></span>

So the 404 will continue to exist as long as that code with the link in it does.

Is this anything to do with the schema.org stuff in the new version of the theme or child theme? Of is it totally down to the fact that I am using the bbPress plugin on my site? For instance, does bbPress cause this?

If anyone else has had this issue and knows of a way to fix it, can you clue me in?

Thanks!

Ken