Free code camp ordered list

i am very new to this and it is giving me a error of
Cannot read property ‘length’ of null i have moved some things around and cant seem to get it fixed anybody got any ideas?

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> WATER </LI>
       <li>Garfield</li>
       <li>Sylvester</li>
    </ol>
</main>

Your browser information:

User Agent is: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.77 Safari/537.36.

Link to the challenge:
https://learn.freecodecamp.org/responsive-web-design/basic-html-and-html5/create-an-ordered-list/

Capitalization matters.

jesus lol i completely missed that thank you