I have the same problem

These are the guidelines for breadcrumbs schema
https://developers.google.com/search/docs/data-types/breadcrumb

The correct html should look like this
<div itemscope itemtype="http://schema.org/BreadcrumbList">
<span itemprop="itemListElement" itemscope itemtype="http://schema.org/ListItem">

<span itemprop="name">Home</span>

</span>
<span itemprop="itemListElement" itemscope itemtype="http://schema.org/ListItem">

<span itemprop="name">Category</span>

</span>
<span itemprop="itemListElement" itemscope itemtype="http://schema.org/ListItem">

<span itemprop="name">This page</span>

</span>
</div>

This is an important signal for SEO. It was implemented last year. To fix it in Newspaper theme means creating a custom post template to replace the td breadcrumbs div.

Forget trying a child theme. That doesn’t work.