The subscribe newsletter button is working fine in desktop. But once I open it on the mobile device (tested on multiple mobile phone), the subscribe button is not working after I press it. Nothing happen after pressing the button. (Except the button turned black). Please take a look at the attached screenshot. Please advice how to resolve this issue.
The problem comes from the browser cross domain origin policy. Your configuration url is site.com and some mobiles (iPhone e.g.) always opens the http://www.site.com version. Since we use the default routing generators Newsletter block requests a non www url from www domain (a cross domain request).