Fatal error: Uncaught Error: Call to a member function insertBefore() on null in /var/www/clients/client1/web2/web/modules/change_description_of_category_and_manufacture/hooks/display.php:60 Stack trace: #0 /var/www/clients/client1/web2/web/class/class.Event.php(300): Core::{closure}(NULL) #1 /var/www/clients/client1/web2/web/class/class.Core.php(305): Event::run('system.display', '<!DOCTYPE html>...') #2 /var/www/clients/client1/web2/web/index.php(820): Core::reader('<!DOCTYPE html>...') #3 {main} thrown in /var/www/clients/client1/web2/web/modules/change_description_of_category_and_manufacture/hooks/display.php on line 60