PHP Core Warning – yii\base\ErrorException

$_GET = [
    'random' => '1791552219',
];

$_COOKIE = [
    '_csrf' => '8470bf71a05fd25e7ce22bd18e0481c007a31882f68d408232f275c304eadf75a:2:{i:0;s:5:"_csrf";i:1;s:32:"9cHUwd0f4sqpztAZLMvzI8--b4H713dg";}',
    'topics-session' => '1791990548.221.16975.161422|d197bbbd1d400bd72372bc93068ad169',
    'PHPSESSID' => '6u4msgrn86slvvq3s06nhhnpa2',
];

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