PHP Core Warning – yii\base\ErrorException

$_GET = [
    'random' => '1790889473',
];

$_COOKIE = [
    'PHPSESSID' => 'ssosbkgsiiar0saj83f05i0na4',
    'topics-session' => '1790895083.171.16480.807852|d197bbbd1d400bd72372bc93068ad169',
    '_csrf' => 'bb66f7b89a258186aff94b7d89f57a5193b842a5e4a92dcc3a32be6101796b51a:2:{i:0;s:5:"_csrf";i:1;s:32:"aQfyuKVVMxA9pFqM3Oa2jZeEV5xWS_7m";}',
];

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