PHP Core Warning – yii\base\ErrorException

$_GET = [
    'random' => '1791430977',
];

$_COOKIE = [
    '_csrf' => '0ae3cf16ba0f0da101efe670ed6d68e3b805957172a7e6bf1b00ccc650c35182a:2:{i:0;s:5:"_csrf";i:1;s:32:"cPKK73i4GsQiMELc8tt15qGjcK6WcQz4";}',
    'topics-session' => '1791483435.869.16478.253226|d197bbbd1d400bd72372bc93068ad169',
    'PHPSESSID' => 'mgg8sj7i73glupnnheche3sks6',
];

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