Fatal error: Uncaught Error: Call to undefined function add_action() in /home/kacperg/public_html/kacpergr/wp-content/plugins/jetpack/modules/markdown/easy-markdown.php:818 Stack trace: #0 /home/kacperg/public_html/kacpergr/wp-content/plugins/jetpack/modules/markdown.php(15): include() #1 {main} thrown in /home/kacperg/public_html/kacpergr/wp-content/plugins/jetpack/modules/markdown/easy-markdown.php on line 818