PHP Core Warning – yii\base\ErrorException

$_GET = [
    'random' => '1791183657',
];

$_COOKIE = [
    'topics-session' => '1791525356.011.16974.384914|d197bbbd1d400bd72372bc93068ad169',
    'PHPSESSID' => 'h049jp3slb97gmjgr89jnlccb5',
    '_csrf' => 'a8b4e45e50e781651607fbd1fffec95c2bf76656d6ce0d2079f09f1695021b29a:2:{i:0;s:5:"_csrf";i:1;s:32:"73tuo9LhWIHCvQZgXye-g6s8aw4wftZ7";}',
];

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