When attempting to validate Stripe while using Gravity Forms and their new Stripe plugin both of my Secret keys fail to validate in the back end settings page. If I change to any of the “twenty” themes it works again.
While working with Gravity Forms support we’ve discovered that the ajax request is coming back valid however it is being padded with white space (Example from my theme: http://grab.by/y2SE).
Where should I begin troubleshooting? What part of a template would add white space to all /wp-admin/admin-ajax.php calls?