Step 20:Use list item (li) elements to create items in a list. Here is an example of list items in an unordered list:

Tell us what’s happening:
Describe your issue in Step 20

Use list item ( li ) elements to create items in a list. Here is an example of list items in an unordered list: detail here.

    <li>cat nip</li>
    <li>laser poinsters</li>
    <li>lasagna</li>

Whats is wrong?

You have a typo - check the spelling of the text in the second list item.