i am stuck at stage 12

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

  **Your code so far**
<html>CatPhotoApp</html>
<body>
  <h1>Hello World</h1>
</body>
</html>
  **Your browser information:**

User Agent is: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/99.0.4844.51 Safari/537.36

Challenge: Step 1

Link to the challenge:

<html>CatPhotoApp</html>

That text is supposed to be inside an h1 element.
It is probably easier to just reset and try again

<html>
  <body>
    <h1>Only change this text to CatPhotoApp</h1>
  </body>
</html>

With html, always remember all elements must be nested in the tags.