I cannot for the life of me, figure out what could be wrong with my campingList component markup for the "Create a Simple Camping List Lightning Component" challenge.  This is the markup for campingList.cmp:

<aura:component>
     <ul>
        <li>Bug Spray</li>
        <li>Bear Repellant</li>
        <li>Goat Food</li>
    </ul>
 </aura:component>

Please help me figure out why I am getting the error.  Thank you, Susan