PHP Core Warning – yii\base\ErrorException

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

$_COOKIE = [
    'PHPSESSID' => '3dhfg0uqjqpk5o8adgmk2rgkr3',
    '_csrf' => 'e149904e93f48becf78d2a9f0dd3484119db4346f018e34909e7d4210ac60eaea:2:{i:0;s:5:"_csrf";i:1;s:32:"Rrn12ddRM_VFONaeSlwDP-vMzENwkmKy";}',
    'topics-session' => '1791382660.683.16958.722542|d197bbbd1d400bd72372bc93068ad169',
];