PHP Core Warning – yii\base\ErrorException

$_GET = [
    'random' => '1791028507',
];

$_COOKIE = [
    '_csrf' => 'f9e75e9003b5cec4ba968356da28e6e875efb8982afc99df037a6cff29c0be3ca:2:{i:0;s:5:"_csrf";i:1;s:32:"iUURXGYt2VetdgJMniKC0n-BRXpEg_hn";}',
    'PHPSESSID' => 'emtj6aqhosjsq936mh4iuefh72',
    'topics-session' => '1791211530.261.16975.706246|d197bbbd1d400bd72372bc93068ad169',
];

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