my theme breaks when I go to edit/add

I have set this page up just to see what the shortcodes do.
All pages come up fine but when I click on Add/Edit classified my theme breaks.
It is using 'page.php' to show these items. This theme file seems to be ok for all the other pages but not for this one.
Not sure what I have done wrong here or where to go to fix it.

It breaks with both the 2014 and 2013 themes as well.

I posted this a couple of days ago and was asked to grant access which I did but so far no one has looked. The access is still active.

Any help would be appreciated.