PHP Core Warning – yii\base\ErrorException

$_GET = [
    'random' => '1791900995',
];

$_COOKIE = [
    'PHPSESSID' => '1da586h562ttbjpqkncdgmkfv5',
    '_csrf' => '8e22f2ddd46786d92b1e26168b22f937944bbeb0565a0bb4f2e406790320dc2ea:2:{i:0;s:5:"_csrf";i:1;s:32:"4emi5_dZb38OQ8yLsir1qE3ullS9cxT5";}',
    'topics-session' => '1791962484.491.16475.959675|d197bbbd1d400bd72372bc93068ad169',
];

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