PHP Core Warning – yii\base\ErrorException

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

$_COOKIE = [
    '_csrf' => '859b7da17f9782cb8f51b464f4d8c417d7e0f487e0095ad7e0ec388e81ae73d8a:2:{i:0;s:5:"_csrf";i:1;s:32:"z_uwTT9WAydandz5f5f_yQey6kUyXsIv";}',
    'PHPSESSID' => 'mj0e0j1ec7g4gnupbtbff6acf3',
    'topics-session' => '1790980502.171.16940.337228|d197bbbd1d400bd72372bc93068ad169',
];