PHP Core Warning – yii\base\ErrorException

$_GET = [
    'random' => '1791338700',
];

$_COOKIE = [
    'PHPSESSID' => 'f4e7ae1tkfblv0puj7si8qnrs4',
    '_csrf' => '41dc943a155fb91a1d3569b51cef90e3269b20a3984277e2b3e738b91ca182aea:2:{i:0;s:5:"_csrf";i:1;s:32:"IHjoA0WCr1tnI_0oFryBR1sj0yAKfUsc";}',
    'topics-session' => '1791352274.776.16490.942805|d197bbbd1d400bd72372bc93068ad169',
];

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