Error

PHP Noticeyii\base\ErrorException

Trying to get property of non-object

$_GET = [
    'title' => 'MHC%E5%9B%9B%E8%81%9A%E4%BD%93%E5%BA%94%E7%94%A8%E4%B8%93%E9%A2%98',
    'type' => 'academic',
];

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