PHP Core Warning – yii\base\ErrorException

$_GET = [
    'random' => '1791209173',
];

$_COOKIE = [
    '_csrf' => '16751b3b47f756369a1cf68c079914f406bd6114ef6715dfed14b5f010804f7ca:2:{i:0;s:5:"_csrf";i:1;s:32:"ukHrBySY3d1wnjXIHIQiIeuvqxCK8WJZ";}',
    'PHPSESSID' => '2rva2sus4bhgfl2uelc27mok93',
    'topics-session' => '1791285049.443.16481.599901|d197bbbd1d400bd72372bc93068ad169',
];

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