PHP Core Warning – yii\base\ErrorException

$_GET = [
    'random' => '1791477837',
];

$_COOKIE = [
    'PHPSESSID' => '5gkaq2qc5fumkq9q3rc4v6gvh7',
    '_csrf' => '984dbf09fadda32f7c245362ebe44fb2058c7135fb7c5d9b9cd1cf686b151af3a:2:{i:0;s:5:"_csrf";i:1;s:32:"32scbSbAgKXfGPPbrifbzPw0Mxx3mPuL";}',
    'topics-session' => '1791555039.205.16901.76997|d197bbbd1d400bd72372bc93068ad169',
];

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