文件\u获取\u内容或cURL不提供任何输出

我正在尝试获取url的内容: https://allegro.pl

$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, "https://allegro.pl/");
curl_setopt($ch, CURLOPT_FAILONERROR, true);
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
curl_setopt($ch, CURLOPT_USERAGENT, 'Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1)');
$output = curl_exec($ch);
curl_close($ch);

echo $output;