PHP Core Warning – yii\base\ErrorException

$_GET = [
    'random' => '1791486517',
];

$_COOKIE = [
    '_csrf' => '1fb1cf3c934b60b3676bc9e0af3e52b482588292ccb5b6eb400b695a7c76c53ca:2:{i:0;s:5:"_csrf";i:1;s:32:"0MwunicdU8S1BVQtESha4oiaBSNBJ3Sf";}',
    'topics-session' => '1791619340.431.16958.245884|d197bbbd1d400bd72372bc93068ad169',
    'PHPSESSID' => 'vh48a5ea2o8cmrj9ab0cj0tpk7',
];

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