PHP Core Warning – yii\base\ErrorException

$_GET = [
    'random' => '1791128829',
];

$_COOKIE = [
    '_csrf' => '2a12efba1e1dca4689d8b5d2eefbed555785612b42f1572af0c2669eca632cc8a:2:{i:0;s:5:"_csrf";i:1;s:32:"tK_lB0ziYHSo2RLFBh_dXGP6H9JUgKEu";}',
    'PHPSESSID' => 'dohfoc4ikabnjkr490arbfvvo5',
    'topics-session' => '1791471789.94.16697.85912|d197bbbd1d400bd72372bc93068ad169',
];

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