Please help me figure out why the background wont go green?

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>
<input type="text" placeholder="cat photo URL">
<form action="/url-http://freecatphotoapp.com/submit-cat-photo"
  <input>
</form>
</main>
  **Your browser information:**

User Agent is: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/88.0.4324.146 Safari/537.36.

Challenge: Create a Form Element

Link to the challenge:

The failing test message says;
The existing input element should be nested within a form element. Your form should have an action attribute which is set to https://freecatphotoapp.com/submit-cat-photo
Your form element should have well-formed open and close tags.

  1. You didn’t nest the existing input element. You created a new, blank one.
  2. Look at the URL. In yours there are five (5) unnecessary characters preceeding the URL