Publish Not working

No matter what I add under customize, or theme options, I get "Looks like something’s gone wrong. Wait a couple seconds, and then try again." It does save to the front end but it doesn't complete on the back end and stays in publish mode. Also, the media library fails to load.  The only way I can get that page to open is to 'add new'.  It won't show me what is already there. novascotiapantry.ca   <span class="edd_sl_license_key"> </span>