PHP Core Warning – yii\base\ErrorException

$_GET = [
    'random' => '1791119243',
];

$_COOKIE = [
    'PHPSESSID' => '6pat677s24ouspjhhkaholhu83',
    '_csrf' => '64011df7cad3a8ebbf6da2182fc29d73f1715cc639c708375f83417c166887b8a:2:{i:0;s:5:"_csrf";i:1;s:32:"9jrKll7t2x7FcV9tut4JJ9zpf_aIg-SX";}',
    'topics-session' => '1791306771.071.16697.75244|d197bbbd1d400bd72372bc93068ad169',
];

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