BreadcrumbList error

I’ve read many posts about this problem, but I have not been able to solve it.
I am using bcn_display() in the templates.

How can I get this result, as Google suggests?

<ul itemscope itemtype="https://schema.org/BreadcrumbList">
  <li itemprop="itemListElement" itemscope
      itemtype="https://schema.org/ListItem">
    <a itemprop="item" href="https://example.com/dresses">
    <span itemprop="name">Dresses</span></a>
    <meta itemprop="position" content="1" />
  </li>
</ul>

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