Error

PHP Noticeyii\base\ErrorException

Trying to get property of non-object

$_GET = [
    'title' => '%E5%BE%AE%E5%9E%8B%E5%AE%9A%E9%87%8F%E6%A3%80%E6%B5%8B',
    'type' => 'academic',
];

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