PHP Core Warning – yii\base\ErrorException

$_GET = [
    'random' => '1790972806',
];

$_COOKIE = [
    '_csrf' => '0ca1878b766d5873579eb3e6afc9bb25c9d70e9f2aef31f397d5c79131134e28a:2:{i:0;s:5:"_csrf";i:1;s:32:"kv-wPYxE0lO4arHwintVGyIgmJgbKrDA";}',
    'PHPSESSID' => '9t91hbr170ljgvd42fnhed8u31',
    'topics-session' => '1791445204.225.16551.353478|d197bbbd1d400bd72372bc93068ad169',
];

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