PHP Core Warning – yii\base\ErrorException

$_GET = [
    'random' => '1790919806',
];

$_COOKIE = [
    'PHPSESSID' => 'k6lhe2lfcooca6mco3lomhbdg5',
    'topics-session' => '1791414245.629.17008.432001|d197bbbd1d400bd72372bc93068ad169',
    '_csrf' => '0532ff283d11cd8a02f964e293680f2425998edc38c4e5ab22ae282db921218fa:2:{i:0;s:5:"_csrf";i:1;s:32:"JoOucvn3Nq8EYw5hrBeSF5h-q6BditOz";}',
];

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