PHP Core Warning – yii\base\ErrorException

$_GET = [
    'random' => '1790973743',
];

$_COOKIE = [
    '_csrf' => '37dccc7ba004f48a504358a89d9ba998981e06f4ed1d653728ee62e36c972718a:2:{i:0;s:5:"_csrf";i:1;s:32:"hUc6Pi36MoVS5re3o6rhuGJGxW_C1ThF";}',
    'PHPSESSID' => '7oicf61visve5v39nblaucg8u7',
    'topics-session' => '1791019268.24.16974.868346|d197bbbd1d400bd72372bc93068ad169',
];

$_SESSION = [
    '__flash' => [],
];