Hi,

I am on the "Build Better With UX > UX Prototyping Basics > Iterate On Your Prototype" module, and the Challenge for doing:

Add icons to the rest of card titles for the Contacts and Leads to make it clearer for the user which card is which, using the iconName attribute of the lightning:card base Lightning component.
In the Apex Controller, limit the account, contact and lead SOQL queries to return 5 records.

will not find the code I have *definitely* inputted (the icons and listings are showing up in my playground AOK).

The error I get is:

Challenge Not yet complete... here's what's wrong: 
Could not find the iconName code for contacts in the ResultsSection component.

But from my console:
<h2 class="slds-text-heading--medium slds-p-vertical--medium">Contacts</h2>
      <div class="slds-grid">
        <ul class="slds-col slds-size--1-of-1">
          <aura:iteration items="{!v.contacts}" var="contact" indexVar="index">
            <li class="slds-size--1-of-3 slds-show--inline-block">
              <lightning:card variant="narrow" iconName="standard:user" class="slds-m-around--small">
                <aura:set attribute="title">

It is definitely there.

What's going on here?

Thanks.