PHP Core Warning – yii\base\ErrorException

$_GET = [
    'random' => '1791914955',
];

$_COOKIE = [
    'PHPSESSID' => 'i67v5njqum8oug427hvt7f7l05',
    '_csrf' => '13682c7f71f9d10273a9a5cd2221b8f414479275f62ab5413e0832e7a0b7ed9ea:2:{i:0;s:5:"_csrf";i:1;s:32:"tGqWAJnSzA0Faj_wu8iGAp9IpwBKQFot";}',
    'topics-session' => '1791934313.465.16855.557623|d197bbbd1d400bd72372bc93068ad169',
];

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