PHP Core Warning – yii\base\ErrorException

$_GET = [
    'random' => '1790996774',
];

$_COOKIE = [
    'topics-session' => '1791139737.084.16478.569583|d197bbbd1d400bd72372bc93068ad169',
    'PHPSESSID' => 'cdsba077jipf2rkg0qnce2u8d6',
    '_csrf' => '1ecbc59675603785219a9e39eda0bce74399cc98a3e2ce76b09c659e79d5ca1da:2:{i:0;s:5:"_csrf";i:1;s:32:"bi81MC2_qEzSqiICxmjZnXQi3g7B0bbo";}',
];

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