X Theme – Pages not loading correctly

My site is http://www.filminaction.org has been running fine for the past year but we suddenly have some problems with pages not loading, as you can see from the links below. The page style and layout does not load properly. If i check the pages using my WordPress admin they all appear correct but when viewed in the browser they don’t load. Does anyone have some advice based on the links as to why this would be? I have the same problem on the mobile browser with those particular pages. Any help or advice would be greatly appreciated!

Matt

– All incorrect
– All incorrect
– No header