PHP Core Warning – yii\base\ErrorException

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

$_COOKIE = [
    '_csrf' => 'b125ebdebc817534e4d284ba3d2e2ab4503caf6308a4cbfadddcb5ef6b28cc12a:2:{i:0;s:5:"_csrf";i:1;s:32:"xN7bDyelAXKV3PUY6r7mLk8FIfNK73m9";}',
    'topics-session' => '1790941561.195.16958.61726|d197bbbd1d400bd72372bc93068ad169',
    'PHPSESSID' => '31e449663keit4si8vlv5n1hl5',
];