PHP Core Warning – yii\base\ErrorException

$_GET = [
    'random' => '1791268198',
];

$_COOKIE = [
    'topics-session' => '1791487202.767.16814.524337|d197bbbd1d400bd72372bc93068ad169',
    'PHPSESSID' => 'nnm4f5pa36f5d3n24oasqf6ei7',
    '_csrf' => 'a454ca79c80913b116bf2a773d3b19df2e42280e3db31c398cf4e5c5fb68d885a:2:{i:0;s:5:"_csrf";i:1;s:32:"AOraobZqsrMvUOG3zFZfLOFOpv9N4j6z";}',
];

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