Fatal error for custom template after upgrading 5.27.2

Hi I have run a custom template for years with no problems, but after the latest upgrade it fires a fatal error and the entire page content can not be displayed

[16-Aug-2021 00:24:29 UTC] PHP Fatal error:  Uncaught Error: Call to a member function have_posts() on null in /path/wp-content/themes/mytheme/yarpp-template-MYTEMPLATE-thumb.php:1
Stack trace:
#0 /path/wp-content/plugins/yet-another-related-posts-plugin/classes/YARPP_Core.php(1589): include()
#1 /path/wp-content/plugins/yet-another-related-posts-plugin/classes/YARPP_Core.php(1513): YARPP->get_template_content(53572, Array, 5)
#2 /path/wp-content/plugins/yet-another-related-posts-plugin/classes/YARPP_Core.php(1380): YARPP->display_related(53572, Array, false)
#3 /path/wp-content/plugins/yet-another-related-posts-plugin/classes/YARPP_Core.php(1956): YARPP->display_basic()
#4 /path/wp-includes/class-wp-hook.php(303): YARPP->the_content('<div class="lea...')
#5 /home/path in /path/wp-content/themes/MYTHEME/yarpp-template-MYTEMPLATE-thumb.php on line 1

line: 1 of the template is

<?php if ($related_query->have_posts()):?>

can you please help ?

• This topic was modified 3 years, 3 months ago by Aircut.
• This topic was modified 3 years, 3 months ago by Aircut.