PHP Core Warning – yii\base\ErrorException

$_GET = [
    'random' => '1791964619',
];

$_COOKIE = [
    'topics-session' => '1792037389.627.16974.840185|d197bbbd1d400bd72372bc93068ad169',
    '_csrf' => '961ba43f9dd07ae59f85c75d731865bd24a8d35641ec096b5d0c8aa8d8724600a:2:{i:0;s:5:"_csrf";i:1;s:32:"7GH_-A_y84TihrC_cKa5_BO_aqCkGES8";}',
    'PHPSESSID' => '7gkbgc7ffp6klkpvs0pljd6q02',
];

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