I am not sure if this is a Komento issue or an EasyBlog issue but when some people leave a comment as a guest, their name is hyperlinked as though they are a member. But there is a error page if a person clicks on their hyperlink instead of linking to their profile page.
Check out this page:
https://www.drcarney.com/blog/entry/sugar-sweetened-beverage-diet-soda-and-fatty-liver-disease-in-the-framingham-heart-study-cohorts#comment-1026,0
Then click on the name Peter Goldstein.
Actually there are two hyperlinks with his name as it appears twice. They both are trying to go to different urls neither of which works.