Theme Live Customizer not working

Hi, I am trying to customize my theme via the theme customizer but it is not working. When I open the page, only the side bar menu will display and the site does not display. Also the accordation menu in the sidebar is not working. I have tried with various themes including 2012, 2013 and 2014 but all of them have the same error and therefore it is not a template issue. Kindly assist.