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Warning: Undefined array key "user" in /www/wwwroot/portal.vietelite.edu.vn/app/Controllers/HomeController.php on line 13

Fatal error: Uncaught TypeError: Slim\Handlers\Strategies\RequestResponse::__invoke(): Return value must be of type Psr\Http\Message\ResponseInterface, null returned in /www/wwwroot/portal.vietelite.edu.vn/vendor/slim/slim/Slim/Handlers/Strategies/RequestResponse.php:39 Stack trace: #0 /www/wwwroot/portal.vietelite.edu.vn/vendor/slim/slim/Slim/Routing/Route.php(362): Slim\Handlers\Strategies\RequestResponse->__invoke() #1 /www/wwwroot/portal.vietelite.edu.vn/vendor/slim/slim/Slim/MiddlewareDispatcher.php(73): Slim\Routing\Route->handle() #2 /www/wwwroot/portal.vietelite.edu.vn/vendor/slim/slim/Slim/MiddlewareDispatcher.php(73): Slim\MiddlewareDispatcher->handle() #3 /www/wwwroot/portal.vietelite.edu.vn/vendor/slim/slim/Slim/Routing/Route.php(321): Slim\MiddlewareDispatcher->handle() #4 /www/wwwroot/portal.vietelite.edu.vn/vendor/slim/slim/Slim/Routing/RouteRunner.php(74): Slim\Routing\Route->run() #5 /www/wwwroot/portal.vietelite.edu.vn/public/index.php(29): Slim\Routing\RouteRunner->handle() #6 /www/wwwroot/portal.vietelite.edu.vn/vendor/slim/slim/Slim/MiddlewareDispatcher.php(283): {closure}() #7 /www/wwwroot/portal.vietelite.edu.vn/vendor/slim/slim/Slim/MiddlewareDispatcher.php(73): Psr\Http\Server\RequestHandlerInterface@anonymous->handle() #8 /www/wwwroot/portal.vietelite.edu.vn/vendor/slim/slim/Slim/App.php(209): Slim\MiddlewareDispatcher->handle() #9 /www/wwwroot/portal.vietelite.edu.vn/vendor/slim/slim/Slim/App.php(193): Slim\App->handle() #10 /www/wwwroot/portal.vietelite.edu.vn/public/index.php(42): Slim\App->run() #11 {main} thrown in /www/wwwroot/portal.vietelite.edu.vn/vendor/slim/slim/Slim/Handlers/Strategies/RequestResponse.php on line 39