Fatal error: Uncaught Error: Call to undefined function add_action() in /home/oho09/public_html/lekcjatestdm/wp-content/themes/sydney/inc/classes/class-sydney-modules.php:18 Stack trace: #0 /home/oho09/public_html/lekcjatestdm/wp-content/themes/sydney/inc/classes/class-sydney-modules.php(185): Sydney_Modules->__construct() #1 {main} thrown in /home/oho09/public_html/lekcjatestdm/wp-content/themes/sydney/inc/classes/class-sydney-modules.php on line 18