PHP Core Warning – yii\base\ErrorException

$_GET = [
    'random' => '1791780353',
];

$_COOKIE = [
    'PHPSESSID' => '5cu7r4kr98t7n42pnvoultej72',
    '_csrf' => '5d2cb5bb5a23c20e43d4bb538b792708020958164bb48c35e2ab7e8c215b0b1da:2:{i:0;s:5:"_csrf";i:1;s:32:"pwrdugmWvHMAWiW3dQdaspm_zcDmdzmV";}',
    'topics-session' => '1791783120.811.16475.458948|d197bbbd1d400bd72372bc93068ad169',
];

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