PHP Core Warning – yii\base\ErrorException

$_GET = [
    'random' => '1791205341',
];

$_COOKIE = [
    'topics-session' => '1791257682.567.16940.780865|d197bbbd1d400bd72372bc93068ad169',
    '_csrf' => '65ea16a2fa44d75d7dea5f77e9f74d41214883a825f022767e94e81f6fc13e7ca:2:{i:0;s:5:"_csrf";i:1;s:32:"jP3GjJRrdhhg92s_pxXrW4t-7f33VLSP";}',
    'PHPSESSID' => 'fk7f6bnnhv9p1hpbqkt9shabj3',
];

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