Fatal error: Uncaught Error: Call to undefined function add_action() in /home/wmichal67/public_html/lekcjatest-1v-mw/wp-content/themes/sydney/inc/customizer/controls/display-conditions/ajax-callback.php:185 Stack trace: #0 {main} thrown in /home/wmichal67/public_html/lekcjatest-1v-mw/wp-content/themes/sydney/inc/customizer/controls/display-conditions/ajax-callback.php on line 185