Whay code don't work

Hello,
whay this code don’t work on my site

<!DOCTYPE html>
<head>
  <script src='https://meet.jit.si/external_api.js'></script>
</head>
<script>
const options = {
parentNode: document.querySelector('#meeting')
}
meetAPI = new JitsiMeetExternalAPI("meet.jit.si", options);

</script>
<body>

<div id="meeting"></div>


</body>
</html>

Thank you.