PHP Core Warning – yii\base\ErrorException

$_GET = [
    'random' => '1791494893',
];

$_COOKIE = [
    'topics-session' => '1791716664.94.16855.695738|d197bbbd1d400bd72372bc93068ad169',
    '_csrf' => 'da5f4d8c4cda76428159edc0d05ac6f70407744b99d754ca4830479b6d8756e2a:2:{i:0;s:5:"_csrf";i:1;s:32:"xSQjnJBixn1p3mvOn_mgGhaPm7RTDO8i";}',
    'PHPSESSID' => 'bck1to2c6v6ldhc0tt03efua31',
];

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