PHP Core Warning – yii\base\ErrorException

$_GET = [
    'random' => '1791906876',
];

$_COOKIE = [
    'PHPSESSID' => '6jgtbund7qhq9sk4h2cfgfd5k3',
    'topics-session' => '1791944799.585.16477.314470|d197bbbd1d400bd72372bc93068ad169',
    '_csrf' => 'f826c85b20eb65bfa05868cb784fba842ad9fbdb76d9cf86420a6957967d7f6ca:2:{i:0;s:5:"_csrf";i:1;s:32:"-rifdTK_wuERy5Msca5LTDRShi32w3jJ";}',
];

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