Fatal error: Uncaught Error: Call to undefined function add_action() in /home/wmichal67/public_html/lekcjatest-1v-mw/wp-content/themes/sydney/inc/classes/class-sydney-posts-archive.php:32 Stack trace: #0 /home/wmichal67/public_html/lekcjatest-1v-mw/wp-content/themes/sydney/inc/classes/class-sydney-posts-archive.php(22): Sydney_Posts_Archive->__construct() #1 /home/wmichal67/public_html/lekcjatest-1v-mw/wp-content/themes/sydney/inc/classes/class-sydney-posts-archive.php(279): Sydney_Posts_Archive::get_instance() #2 {main} thrown in /home/wmichal67/public_html/lekcjatest-1v-mw/wp-content/themes/sydney/inc/classes/class-sydney-posts-archive.php on line 32