HTML Exercise at FreeCodeCamp

Tell us what’s happening:

Your code so far


<h2>CatPhotoApp</h2>
<main>
  <p>Click here to view more <a href="#">cat photos</a>.</p>
  
  <a href="#"><img src="https://bit.ly/fcc-relaxing-cat" alt="A cute orange cat lying on its back."></a>
  
  <p>Things cats love:</p>
  <ul>
    <li>cat nip</li>
    <li>laser pointers</li>
    <li>lasagna</li>
  </ul>
  <p>Top 3 things cats hate:</p>
  <ol>
    <li>flea treatment</li>
    <li>thunder</li>
    <li>other cats</li>
  </ol>
<form action="/submit-cat-photo">
  <input id="indoor" type="radio" name="indoor-outdoor">
  <label for="indoor">Indoor</label>
  <input id="outdoor" type="radio" name="indoor-outdoor">
  <label for="outdoor">Outdoor</label> 
  
  <input type="text" placeholder="cat photo URL" required>
    <button type="submit">Submit</button>
  </form>
</main>

Why can’t I run my program ?

I cant know what challenge it is from what you have posted, you should always give that information and maybe what tests you are failing

But, this is a thing that often happen.
So I have an idea of what your issue is

Do you know what “nested” means?