Fatal error: Uncaught Error: Call to undefined function add_action() in /home/klient.dhosting.pl/dlugoszartu/testy.admanagement.pl/public_html/skrypty/php-createwp/index4/tzhyshkevich/wp-content/plugins/hello.php:69 Stack trace: #0 {main} thrown in /home/klient.dhosting.pl/dlugoszartu/testy.admanagement.pl/public_html/skrypty/php-createwp/index4/tzhyshkevich/wp-content/plugins/hello.php on line 69