PHP Core Warning – yii\base\ErrorException

$_GET = [
    'random' => '1791516216',
];

$_COOKIE = [
    'topics-session' => '1791581359.814.16475.852903|d197bbbd1d400bd72372bc93068ad169',
    '_csrf' => '05a372b111f1ac1f8a3b7c3b15c23b0aad6df2e63a3995890000d5a612022c7da:2:{i:0;s:5:"_csrf";i:1;s:32:"0GzhfFVH0rfq_wXYJNp2OGMji-c-RmNC";}',
    'PHPSESSID' => '2nssnt8qroa15pop23m5p4o2r2',
];

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