PHP Core Warning – yii\base\ErrorException

$_GET = [
    'random' => '1791038774',
];

$_COOKIE = [
    'PHPSESSID' => 'fn4jgnfk8re8ps1bs3bckih9t2',
    '_csrf' => '60e415df96ba59b114b70d728d4f31293ef4cdbc7f6dc6464a2ee2d7561fca9da:2:{i:0;s:5:"_csrf";i:1;s:32:"nG4KrXBhWVXHe8DZfa8280JT5Sza-5QV";}',
    'topics-session' => '1791318884.369.16482.130910|d197bbbd1d400bd72372bc93068ad169',
];

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