title: Contact Form 7 stopped working with datalayer push
body: <p>I am using the Google Tag manager on my websites. I have the Analytics code inside and event triggers for analytics conversion tracking. I am tracking sent contact forms (kform) from plugin contact form 7. And it stopped working.</p>
  
  <p>I have this in additional settings: <code>on_sent_ok: "dataLayer.push({'event': 'kform'});"</code></p>
  
  <p>It dont show the sent successfully message and dont sent the email. Anyone can help? It was working for more than 1 year..</p>