PHP Core Warning – yii\base\ErrorException

$_GET = [
    'random' => '1791311531',
];

$_COOKIE = [
    'PHPSESSID' => 't98bchc3rhi1bfvpiqd3dd7tp4',
    'topics-session' => '1791357126.946.16476.92795|d197bbbd1d400bd72372bc93068ad169',
    '_csrf' => '517a8f66aac041c72ce359d21e4220996d1c48e0e262506bd9331c9d1201919da:2:{i:0;s:5:"_csrf";i:1;s:32:"LFPmi3ifpSkBRUW2Mpwc0cT5Es8fMe_f";}',
];

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