I see a different error now, which might bring us closer to the solution:
http://quiquealien.com/wp-admin/admin-ajax.php is missing, error 404
That is not good at all, that's an internal wordpress file. Please check if that file exists on your server in that directory, it's responsible for all WordPress ajax requests on the front-end and back-end.
If the file is not missing, then there must be a malfunctioning .htaccess rule in your .htaccess file, which redirects all requests to the admin-ajax.php file to the default 404 error page.Best,
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