This is the error that shows up:
Timestamp: 14/04/2016 16:42:00
Error: Error: Syntax error, unrecognized expression: a[href*=#]:not([href=#])
Source File: http://gelatissimo.com.au/wp-includes/js/jquery/jquery.js?ver=1.12.3
Line: 2
It’s related to WP updating the jQuery library to 1.12, and a JS file from your theme / other plugins using this a[href*=#]:not([href=#], while it should be a[href*=’#’]:not([href=’#’].
If it’s a premium theme, then you should check for an update. But it’s also possible ‘a[href*=#]:not([href=#]’ is used in a plugin file. The only way to figure out which one it is, is by for second switching back to a default WP theme and see if that fixes it. If it does, then you should search for ‘a[href*=#]:not([href=#]’ in your theme folder and change it in into a[href*=’#’]:not([href=’#’], or contact the theme author. Or just search for ‘a[href*=#]:not([href=#]’ through your plugin files to find which plugin breaks it.
If you have Facebook, then you can read more about it here and here.