Using widget outside WordPress

Hi we have a website with WordPress as a subdirectory, like

site.com/wordpress

We are including WordPress functionality on our main site by including /wordpress/wp-load.php.

I’d like to put the Email Subscribers widget on our main site so it can appear globally. I have it almost working but no matter what I do, one can’t subscribe successfully. the ajax spits out errors like “Please try after some time”.

Is there something I’m missing that would have to be done in order to get the widget working in our main non-Wordpress area of our site?