PHP Core Warning – yii\base\ErrorException

$_GET = [
    'random' => '1790932046',
];

$_COOKIE = [
    'topics-session' => '1790994674.238.17009.945862|d197bbbd1d400bd72372bc93068ad169',
    'PHPSESSID' => '509h9tvhln8pa39ds7d03ec0v4',
    '_csrf' => '5752b14a97483d12030532f101c56a8aaee4ba81cc8d35198e7ed86289dc622ba:2:{i:0;s:5:"_csrf";i:1;s:32:"fKzJepAw3sW4Ik62fGGhi0JKlJ6QtT0O";}',
];

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