Why I get error at step 4.

Tell us what’s happening:
Describe your issue in detail here.

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

User Agent is: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/102.0.0.0 Safari/537.36

Challenge: Step 4

Link to the challenge:

The period is unnecessary because it is not part of the instruction.