PHP Core Warning – yii\base\ErrorException

$_GET = [
    'random' => '1791404729',
];

$_COOKIE = [
    'topics-session' => '1791413951.054.16814.995212|d197bbbd1d400bd72372bc93068ad169',
    '_csrf' => '70b7471e45217dccb773d4580417ac20e06d85e78948a10c5292c532cdceb49ba:2:{i:0;s:5:"_csrf";i:1;s:32:"vTxjSQl8TIIv9D9DKZTj2x2lPXeVysfv";}',
    'PHPSESSID' => '35ghjb80suqgamlutacmgupv73',
];

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