PHP Core Warning – yii\base\ErrorException

$_GET = [
    'random' => '1791348671',
];

$_COOKIE = [
    'topics-session' => '1791432164.778.16551.764846|d197bbbd1d400bd72372bc93068ad169',
    '_csrf' => 'abe96465b28e868a7509e636d4d1cc50fdc7fc9bc2ec8ed8f543f2afb6b05884a:2:{i:0;s:5:"_csrf";i:1;s:32:"1wkhZQvB_1-WjqPkjyMC20tCsIV0Oy_9";}',
    'PHPSESSID' => '0lq4s8lr4924ic8bqd3j59kir2',
];

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