Warning: Attempt to read property "cache" on null in /usr/local/www/wordpress/wp-content/plugins/yet-another-related-posts-plugin/includes/template_metabox.php on line 4

Fatal error: Uncaught Error: Call to a member function enforce() on null in /usr/local/www/wordpress/wp-content/plugins/yet-another-related-posts-plugin/includes/template_metabox.php:4 Stack trace: #0 {main} thrown in /usr/local/www/wordpress/wp-content/plugins/yet-another-related-posts-plugin/includes/template_metabox.php on line 4