In Schema, the url field is not a valid link value - how to fix it?

Question

HTML

Schema org markup Product listing (list of products from one category)
Goes to Google, Yandex grumbles at

WARNING: the value "" in the url field is not a valid link value

What is wrong and how to fix it?

spoiler

<div style="display:none" itemscope itemtype="http://schema.org/ItemList">
<span  itemprop="name">Название категории</span>
<span  itemprop="description">Купить бла-бла-бла</span>
<meta itemprop="numberOfItems" content="1" />
<li itemprop="itemListElement" itemscope itemtype="http://schema.org/ListItem">
<meta itemprop="position" content="1" />
<span  itemtype="http://schema.org/Thing" itemprop="url">https://test.com/cat/mat/bat/</span>
<span  itemprop="name">Sony N-123</span>
<img itemprop="image" src="ttps://test.com/upload/f81d2.jpg" />
</li>
</div>

Answer 1

If you have a site on wordpress and the
Remove Redundant Links plugin is installed, then this will happen in Yandex. Google skips.
If not on wordpress, then you need to write the url of the page in the micro-markup. For example like this:

<?php if(is_front_page() || is_page('kontakty')): ?>
    <div style="display:none;" itemscope itemtype="http://schema.org/Organization">
        <span itemprop="name">Демонтаж </span>
        <div itemprop="address" itemscope itemtype="http://schema.org/PostalAddress">
            <span itemprop="streetAddress">ул. 12-й Котляковский переулок</span>,
            <span itemprop="addressLocality">Москва, Россия</span>,
            <span itemprop="postalCode"></span>.
        </div>
        <img itemprop="logo" src="<?php echo get_template_directory_uri(); ?>/assets/img/logo.svg" />
        <span itemprop="telephone">+7 (495) 324</span>
        <span itemprop="email">[email protected]</span>
        //здесь решается ваша проблема
        <a itemprop="url" href="<?=is_page('kontakty') ? '/kontakty' : '/'?>">Демонтаж</a>
    </div>

<?php endif; ?>

Answer 2

DLE, Wordpress, LiveStreet, InstantCMS