Error Structured Data Testing

Don’t worry, most users have these errors…
Some of them could be fixed by this changes:

content.php
content-featured.php

<h2 class="post-title">
change to:
<h2 class="post-title entry-title">

<p class="post-date"><?php the_time('j M, Y'); ?></p>
change to:
<p class="post-date date updated"><?php the_time('j M, Y'); ?></p>

single.php

<h1 class="post-title"><?php the_title(); ?></h1>
change to:
<h1 class="post-title entry-title"><?php the_title(); ?></h1>

Thank you!
Verry good.
But “Error: Missing required hCard “author”.” Not fix

Hi,
I try many fix and solutions, but none of them work for hCard “author” error.
https://www.lahtela.com/hueman-theme-google-authorship/
https://fivera.net/hatom-feed-hatom-entry-error-wordpress-solution/

If you find solution for this error please share it ??

Thank!
I do not want edit the code, because update idon’t remember re edit.

Hope future versions Alexander Agnarson fix ??