PHP Core Warning – yii\base\ErrorException

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

$_COOKIE = [
    'topics-session' => '1791822981.972.16814.984279|d197bbbd1d400bd72372bc93068ad169',
    'PHPSESSID' => '08mep3ltkqqq1q5in97012s9a6',
    '_csrf' => 'd63d75acc91c99d531011be190ea3c7b58108571c4bc91e436522f0944019a7ba:2:{i:0;s:5:"_csrf";i:1;s:32:"GVacsUwaykxRkhGgoSc35_z4WRp-8TQm";}',
];