Hi Charlenelcapili.,
In which page you are getting the “404 Not Found” error. We checked your site and we did not get any 404 error. Also it seems that you have not installed the dummy data. Please install the dummy data using the unyson method.
Please follow the instructions in the below knowledge base link for installing the demo contents using the Unyson plugin.
http://wesupport.wpengine.com/knowledge-base/how-to-install-the-demo-content-via-unyson-plugin/