PHP Core Warning – yii\base\ErrorException

$_GET = [
    'random' => '1791054189',
];

$_COOKIE = [
    '_csrf' => '17ea52f66013e2e64f6d507e2d4143e5b8f3078b87e69f39dd4eff2e7bfde38ba:2:{i:0;s:5:"_csrf";i:1;s:32:"UjmJ-7A5n9JqYps2dPctMutO39asUmHY";}',
    'topics-session' => '1791490156.273.16551.422560|d197bbbd1d400bd72372bc93068ad169',
    'PHPSESSID' => 'ndrdjl8o98r1gu8geafuonffr3',
];

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