Unable to round-trip http request to upstream: EOF问题

Unable to round-trip http request to upstream: EOF，

今天我用的phpstudy环境中的网站页面忽然打不开了，报错“Unable to round-trip http request to upstream: lookup www.xxxx.com on 62.208.67.4:5: no such host”

最后发现是由于我开了“蓝灯”的关系，关掉（翻墙）就可以了