PHP Core Warning – yii\base\ErrorException

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

$_COOKIE = [
    '_csrf' => '6c3ac062d1f5ca2ba57fc9d791345eadf158393a42c16a11bb9b8cafd1cacbe9a:2:{i:0;s:5:"_csrf";i:1;s:32:"_cB00pISx21DNWfsXnlAtC_M2xbxDDpG";}',
    'PHPSESSID' => '4ni4r4tlokbovoeoa8lmhq5rs6',
    'topics-session' => '1791663316.648.16615.953359|d197bbbd1d400bd72372bc93068ad169',
];