Error

PHP Noticeyii\base\ErrorException

Trying to get property of non-object

$_GET = [
    'slug' => 'inzhenernaya-zashchita-okruzhayushchey-sredy-i-ratsionalnoye-ispolzovaniye-prirodnykh-resursov-master-degree',
];

$_SESSION = [
    '__flash' => [],
];