404 (Page Not Found) Error

Hi! Every time I click on a different page of our website, a page that says “404 (Page Not found) Error” pops up. I am able to see the home page, but cannot click any of the links to visit other pages or posts. I have tried other computers and a cell phone and keep getting the same results. Also, I am not having any trouble editing pages, so I am not sure what is going on. Thank you in advance for your help. Here is the link to our site: http://kymidtownalliance.org/