PHP Core Warning – yii\base\ErrorException

$_GET = [
    'random' => '1791119306',
];

$_COOKIE = [
    'topics-session' => '1791125366.157.16517.37865|d197bbbd1d400bd72372bc93068ad169',
    '_csrf' => '86eedd9462357cf6dcef46598f5c783e407b6db6d21f518ec2540d74956a7efca:2:{i:0;s:5:"_csrf";i:1;s:32:"SrdB6GvVJOefm0o_yw2O4WwTWCRMNFZ9";}',
    'PHPSESSID' => 'gar89fjcdol1ark3g4me61oqg4',
];

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