PHP Core Warning – yii\base\ErrorException

$_GET = [
    'redirect_url' => '/yjds2016/cases/match',
];

$_COOKIE = [
    'topics-session' => '1792020883.922.16476.913422|d197bbbd1d400bd72372bc93068ad169',
    '_csrf' => 'df9c56cc08d23a265130a26332df273542eb4bcb67ba3901a2c9c5c4d3c2cafca:2:{i:0;s:5:"_csrf";i:1;s:32:"WAEMg0J-lNqrcjSTiZcCMA-VEQVnML6o";}',
    'PHPSESSID' => '4gkivjns7g83fjke4u9f7imrs5',
];