PHP Core Warning – yii\base\ErrorException

$_GET = [
    'random' => '1791208437',
];

$_COOKIE = [
    'topics-session' => '1791265715.14.16958.232653|d197bbbd1d400bd72372bc93068ad169',
    '_csrf' => '1b1fe4c7fea4686827a5d4d42421dc6c480619349644fd77bc751f9656e543c7a:2:{i:0;s:5:"_csrf";i:1;s:32:"qTHze0erGHV633W-Repb1Dwfh2bPchoz";}',
    'PHPSESSID' => 'f0pb8s16gtonptuh0vr2813lb0',
];

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