PHP Core Warning – yii\base\ErrorException

$_GET = [
    'random' => '1790945126',
];

$_COOKIE = [
    'PHPSESSID' => '2dms595sbs2f7734b6pptqma84',
    'topics-session' => '1790972850.696.16482.226485|d197bbbd1d400bd72372bc93068ad169',
    '_csrf' => '63a0c0ef8e1f004db607dab3d380f719547e9734fdfc6100f482ea9234a658ffa:2:{i:0;s:5:"_csrf";i:1;s:32:"_7Z2SpvvY3HFOuIYJ40M1PL53ceCFbEi";}',
];

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