PHP Core Warning – yii\base\ErrorException

$_GET = [
    'random' => '1791485636',
];

$_COOKIE = [
    'topics-session' => '1791511658.519.16481.422013|d197bbbd1d400bd72372bc93068ad169',
    'PHPSESSID' => 'dmv7ck4us7oq5ahs410pqvl4u2',
    '_csrf' => '20c9b23761a3c3466d7443a34a3f16687bb96ec5eded1139b115f29acb3967cfa:2:{i:0;s:5:"_csrf";i:1;s:32:"3mH9KrkmgJ9cKnwIIZThdjDp3StEhdDO";}',
];

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