PHP Core Warning – yii\base\ErrorException

$_GET = [
    'random' => '1791402087',
];

$_COOKIE = [
    'PHPSESSID' => 'dlnmn3mhrqq331e0nbq80o80n0',
    'topics-session' => '1791478312.274.16615.68232|d197bbbd1d400bd72372bc93068ad169',
    '_csrf' => '25863144c8fb797b2b1dcf8acabe43ff54df055891cc6a2fa599d297aa3a951fa:2:{i:0;s:5:"_csrf";i:1;s:32:"oiUjyZASCPCSTY8otl2StMK20bb2pEJp";}',
];

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