<?php
require_once(preg_replace('|wp-content.*$|','', __FILE__) . 'wp-config.php');

header('Content-type: text/javascript; charset='.get_settings('blog_charset'), true);
header('Cache-control: max-age=2600000, must-revalidate', true);

// My fix
header('Access-Control-Allow-Origin: '.get_site_url());
header('Access-Control-Allow-Origin: '.str_replace('http://', 'https://', get_site_url()));
// End of my fix

function error(){ die( "alert('Что-то не заработало :(')" ); }

/* ... */