Learn HTML by Building a Cat Photo App - Step 6 - 8xdeMPEgKbq0dZvZh5WuP

Tell us what’s happening:
Describe your issue in detail here.
System says can’t use li or ul

  **Your code so far**
<html>
<body>
  <ul>
    <li>li </li>
    <li>li </li>
    </ul>
  <h1>CatPhotoApp</h1>
  <main>
  <h2>Cat Photos</h2>
  <ul>
<li>li </li>
<li>li </li>
</ul>
  <!-- TODO: Add link to cat photos -->
  <ul>
<li>li </li>
<li>li </li>
  </ul>
  <p>Click here to view more cat photos.</p>
  </ul>
  </main>
</body>
</html>
  **Your browser information:**

User Agent is: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:103.0) Gecko/20100101 Firefox/103.0

Challenge: Learn HTML by Building a Cat Photo App - Step 6

Link to the challenge: