title: WordPress WooCommerce disable email notifications
body: <p>I'm using WooCommerce in my WordPress website.</p>
  
  <p>I want to disable email notification for processing order.</p>
  
  <p>When I go to <code>WooCOmmerce &gt; Settings &gt; Emails &gt; Processing orders</code>, I can unckeck <code>Enable this email notification</code>. </p>
  
  <p>But when I save changes, it seems that the changes are not saved. I canno disable any of thoses email notifications.</p>
  
  <p>When I refresh the page, all the email notifications are still enabled. I have no error message.</p>
  
  <ul>
  <li>I'm using WordPress 4.8.2 with Kallyas theme. </li>
  <li>WooCommerce version 3.1.2.</li>
  <li>WPML Multilingual CMS Version 3.0.1</li>
  <li>WPML Media Version 2.1.1</li>
  </ul>