PHP Core Warning – yii\base\ErrorException

$_GET = [
    'random' => '1791833923',
];

$_COOKIE = [
    'PHPSESSID' => 'l9duqkhup0jegsq0stpi20mkn2',
    '_csrf' => 'e9191a6b77e1cb1be78245f168a999801ac6d1699b635285e3a961ba33e6a6c3a:2:{i:0;s:5:"_csrf";i:1;s:32:"YnoVDQKepsTmPvg93kNTAFsZbnGL3RZA";}',
    'topics-session' => '1791886210.123.16476.878002|d197bbbd1d400bd72372bc93068ad169',
];

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