PHP Core Warning – yii\base\ErrorException

$_GET = [
    'random' => '1791247121',
];

$_COOKIE = [
    'topics-session' => '1791441991.774.17008.715522|d197bbbd1d400bd72372bc93068ad169',
    'PHPSESSID' => 'dga7aj5p8069a1mtpgpfs9ehj4',
    '_csrf' => '15658e446e5456b1e400369c988dcb10a96fa220aa577c4f66c18db785007373a:2:{i:0;s:5:"_csrf";i:1;s:32:"JeVSMYxnwQG8acLRxJas3PeOa4zQRQmT";}',
];

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