PHP Core Warning – yii\base\ErrorException

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

$_COOKIE = [
    'topics-session' => '1791526633.762.16958.678607|d197bbbd1d400bd72372bc93068ad169',
    'PHPSESSID' => 'dvhkrmf9rki3go2e0mfeum31p1',
    '_csrf' => '0a247d33838270bf93c7421f628f2fed7e58833fa5a77780bcc23db65246b17da:2:{i:0;s:5:"_csrf";i:1;s:32:"PE_jcoK1FIwT42XP9_fsq6VYbuC5wNHX";}',
];