PHP Core Warning – yii\base\ErrorException

$_GET = [
    'random' => '1791542828',
];

$_COOKIE = [
    'topics-session' => '1791668134.667.17008.293214|d197bbbd1d400bd72372bc93068ad169',
    '_csrf' => '867081bb2959a532399673ab2d76b5b5fc66abcadd3cf72db8f7637f62f34a9ba:2:{i:0;s:5:"_csrf";i:1;s:32:"iEdohTm3XvnIU6hnp9g4WxQXgv3IP-VE";}',
    'PHPSESSID' => '17rpu5nafq7lphkne3fb1cil22',
];

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