I have closed the audio tag but it id giving an error "Make sure your audio element has a closing tag."

<audio id="my_clip" controls>
  <source src="https://s3.amazonaws.com/freecodecamp/screen-reader.mp3" type="audio/mpeg"/>
</audio>

Please post the code you used

<body>
  <header>
    <h1>Real Coding Ninjas</h1>
  </header>
  <main>
    <p>A sound clip of Zersiax's screen reader in action.</p>
    
<audio id="my_clip" controls>
  <source src="https://s3.amazonaws.com/freecodecamp/screen-reader.mp3" type="audio/mpeg"/>
</audio>
  </main>
</body>

I had the same problem.
If you remove the id attribute from your audio tag, it should work.
Apparently, this messes with the code checking, since it wasn’t asked for in the lesson.