Having a lot of success with the X theme but problem has shown up in that if a user goes the HTTPS:// of our website the pages do not render correctly. This would seem to be because of the non https url in the page?
It seems you are using a CDN (MAxCDN) which is loading over http://. When you are trying to load over https:// these links are getting blocked and not loading. Let’s disable CDN or configure SSL properly. There is no issue with the theme.