Fatal error: Uncaught Error: Call to undefined function add_action() in /home/oho09/public_html/lekcjatestdm/wp-content/themes/sydney/inc/styles.php:35 Stack trace: #0 /home/oho09/public_html/lekcjatestdm/wp-content/themes/sydney/inc/styles.php(24): Sydney_Custom_CSS->__construct() #1 /home/oho09/public_html/lekcjatestdm/wp-content/themes/sydney/inc/styles.php(874): Sydney_Custom_CSS::get_instance() #2 {main} thrown in /home/oho09/public_html/lekcjatestdm/wp-content/themes/sydney/inc/styles.php on line 35