Fatal error: Uncaught Error: Call to undefined function add_action() in /home/FeRRKNG/public_html/szkolazs1mm/wordpress/wp-includes/blocks/categories.php:97
Stack trace:
#0 {main}
thrown in /home/FeRRKNG/public_html/szkolazs1mm/wordpress/wp-includes/blocks/categories.php on line 97