Fatal error: Uncaught Error: Call to undefined function is_admin() in /usr/local/www/wordpress/wp-content/plugins/yet-another-related-posts-plugin/lib/plugin-deactivation-survey/deactivate-feedback-form.php:8 Stack trace: #0 {main} thrown in /usr/local/www/wordpress/wp-content/plugins/yet-another-related-posts-plugin/lib/plugin-deactivation-survey/deactivate-feedback-form.php on line 8