PHP Core Warning – yii\base\ErrorException

$_GET = [
    'random' => '1765913790',
];

$_COOKIE = [
    'topics-session' => '1766063977.183.16319.79430|d197bbbd1d400bd72372bc93068ad169',
    'PHPSESSID' => 'nr66v6jgj9s3ecbgkvfio5uh46',
    '_csrf' => 'a54c06173a04795dc33657d5f6dcc77a1d2f96c4aab560efc73672008cea7a75a:2:{i:0;s:5:"_csrf";i:1;s:32:"fekDNhaY6KvPQwzs904ePE5XHrS2lxA8";}',
];

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