Error

PHP Noticeyii\base\ErrorException

Trying to get property of non-object

$_GET = [
    'slug' => 'bachelors-faculty-ntf',
];

$_SESSION = [
    '__flash' => [],
    'last_controller' => 'bachelors',
    'last_action' => 'bachelors-faculty-ntf',
    'last_page_name' => 'Нефтетехнологический факультет',
    'last_page_menu' => '',
];