PHP Core Warning – yii\base\ErrorException

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

$_COOKIE = [
    'PHPSESSID' => 'ubt4rmhnkgr7nfc30tkkca31l5',
    '_csrf' => '743835502c30f7e73bff4f85c415b3252d318258e7837fd0b91384ba2323e9dca:2:{i:0;s:5:"_csrf";i:1;s:32:"7iXwC_ZEWZuQWXEFNjLOPkx4kra0d-7O";}',
    'topics-session' => '1791272351.694.16476.483476|d197bbbd1d400bd72372bc93068ad169',
];