When your website attempts to load the jQuery Cookie plugin (jquery.cookie.js), you get the HTTP Error 406 – Not Acceptable.
If you try and load the file direct in your browser, you may see the following error:
An appropriate representation of the requested resource /jquery.cookie.js could not be found on this server.”
Your web server is running ModSecurity (also known as mod_security). By default, this blocks filenames that contain the text “.cookie”.
Rename the jquery.cookie.js file to something else like jquery_cookie.js and then update any files which call it to reflect the new filename.