Fatal error: Uncaught Error: Call to undefined function add_action() in /home/antenaserwis/public_html/satserwis/wp-content/themes/twentytwentyone/inc/back-compat.php:24
Stack trace:
#0 {main}
thrown in /home/antenaserwis/public_html/satserwis/wp-content/themes/twentytwentyone/inc/back-compat.php on line 24