title: Contact Form 7 not sending after Wordpress 4.9.2 update
body: <p>All of my sites using Contact Form 7 has stoped working on submit. The response container "wpcf7-mail-sent-ng" says "An error occurred while sending the message. Please try again later." </p>
  
  <p>I get the following feedback:</p>
  
  <blockquote>
    <p>into:"#wpcf7-f112-o1"message:"An error occurred while sending the message. Please try again later."status:"mail_failed"</p>
  </blockquote>
  
  <p>Any ideas how to resolve this? Kind of a big deal as a lot of my customers currently use CF7 on their sites.</p>
  
  <p>Thx</p>
  
  <p><strong>EDIT</strong></p>
  
  <p>I have the same issues, wich started after the Wordpress 4.9.2 automatic update. I have tested sites that are running the same release of CF7 but on another version of Wordpress, and there are no issues then. Seems like a Wordpress problem right?</p>
  
  <p>Also, nothing in the console, and I get the same message in the feedback under the Network tab in devtools.</p>