Fatal error: Uncaught Error: Call to undefined function add_action() in /home/antenaserwis/public_html/satserwis/wp-content/plugins/jetpack/modules/masterbar/wp-posts-list/bootstrap.php:22 Stack trace: #0 {main} thrown in /home/antenaserwis/public_html/satserwis/wp-content/plugins/jetpack/modules/masterbar/wp-posts-list/bootstrap.php on line 22