PHP Core Warning – yii\base\ErrorException

$_GET = [
    'random' => '1791630787',
];

$_COOKIE = [
    'PHPSESSID' => 'i8d8j426jj14hrni6jq85ipn81',
    '_csrf' => 'befc65f4eb937f7f100585746b75a719735022990a9e1acc3bce7ebfb7a1dee2a:2:{i:0;s:5:"_csrf";i:1;s:32:"lQkLkNoX1qeOYbmB2VyqjZEhUI9NjBCD";}',
    'topics-session' => '1791763419.819.17008.710825|d197bbbd1d400bd72372bc93068ad169',
];

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