PHP Core Warning – yii\base\ErrorException

$_GET = [
    'random' => '1791234253',
];

$_COOKIE = [
    'PHPSESSID' => 'v9pc0m22802i4lramf44rfldb2',
    '_csrf' => 'f28f69e66bcf2d932a61d2e3b3ac6f13089dc2b71d7af640892674cfb5a9ad42a:2:{i:0;s:5:"_csrf";i:1;s:32:"3i0HeO8FkASETskFMaNe5_gzu5hRKRQK";}',
    'topics-session' => '1791439058.037.17008.646347|d197bbbd1d400bd72372bc93068ad169',
];

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