PHP Core Warning – yii\base\ErrorException

$_GET = [
    'random' => '1791894092',
];

$_COOKIE = [
    'PHPSESSID' => 'r9sp2tc1n0lgk0qnanop6qspi0',
    'topics-session' => '1791940704.142.16478.725513|d197bbbd1d400bd72372bc93068ad169',
    '_csrf' => '6efaf712b33052851ccf5e987583fb593304563f018ec1a26399b91f42ad21e2a:2:{i:0;s:5:"_csrf";i:1;s:32:"NR6oOj01oDuW_LC1ojmDMCHrRxVdmD6x";}',
];

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