Fatal error: Uncaught TypeError: call_user_func(): Argument #1 ($callback) must be a valid callback, class App\Classes\Configuration does not have a method "getManufacturers" in /var/www/vhosts/mukormok-eshop.hu/httpdocs/supplier.php:62 Stack trace: #0 /var/www/vhosts/mukormok-eshop.hu/httpdocs/manufacturer.php(4): include() #1 {main} thrown in /var/www/vhosts/mukormok-eshop.hu/httpdocs/supplier.php on line 62