Fatal error: Uncaught Error: Call to undefined function add_action() in /home/cezarypiatek1990/public_html/testwordpressa/wp-content/plugins/pe-recent-posts/pe-recent-posts.php:17 Stack trace: #0 {main} thrown in /home/cezarypiatek1990/public_html/testwordpressa/wp-content/plugins/pe-recent-posts/pe-recent-posts.php on line 17