PHP Core Warning – yii\base\ErrorException

$_GET = [
    'random' => '1791132049',
];

$_COOKIE = [
    'PHPSESSID' => '26u0l88vhvudvoffs7g24fg1k2',
    'topics-session' => '1791184481.533.16482.78916|d197bbbd1d400bd72372bc93068ad169',
    '_csrf' => '9cdf0c17e0094f6b57cea84b24a58c9c390d1157dc7b19b18992ca371c7ff165a:2:{i:0;s:5:"_csrf";i:1;s:32:"kH7vV6IO8kXyrrHZ4vhjAYij1j7xYUXG";}',
];

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