Fatal error: Uncaught Error: Undefined constant "Core\Database\DATABASE" in /var/www/songtien.hdcode.name.vn/Core/Database/DB.php:20 Stack trace: #0 /var/www/songtien.hdcode.name.vn/Core/Database/DBHandler.php(26): Core\Database\DB::connect() #1 /var/www/songtien.hdcode.name.vn/Core/Helper/ViewHelper.php(27): Core\Database\DBHandler->__construct() #2 /var/www/songtien.hdcode.name.vn/module/Frontend/Controllers/HomeController.php(13): Core\Helper\ViewHelper->fullDataFrontend() #3 [internal function]: module\Frontend\Controllers\HomeController->index() #4 /var/www/songtien.hdcode.name.vn/Core/Router.php(49): call_user_func_array() #5 /var/www/songtien.hdcode.name.vn/public_html/index.php(15): Core\Router->dispatch() #6 {main} thrown in /var/www/songtien.hdcode.name.vn/Core/Database/DB.php on line 20