Fatal error: Uncaught Error: Call to undefined function add_action() in /home/dawidgrabacz5/public_html/zadaniekb/wyporzyczalnia/wp-includes/blocks/file.php:58 Stack trace: #0 {main} thrown in /home/dawidgrabacz5/public_html/zadaniekb/wyporzyczalnia/wp-includes/blocks/file.php on line 58