PHP Core Warning – yii\base\ErrorException

$_GET = [
    'random' => '1791293353',
];

$_COOKIE = [
    'topics-session' => '1791367589.223.16478.981534|d197bbbd1d400bd72372bc93068ad169',
    'PHPSESSID' => '9i27q9e7n26d8tvtc789gtf1d6',
    '_csrf' => 'f9a026e048c41b1f035c445764370bd0fca3791d52efd48709852e65b86a7948a:2:{i:0;s:5:"_csrf";i:1;s:32:"W0skdvnr1k1uMbg-hdI3va2SIvVpWcUk";}',
];

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