win10下，nginx已经启动，为何无法访问欢迎页面？
任务管理器里显示正在运行，8080端口也没被占用
log文件夹里，错误信息显示：2020/06/26 13:40:17 [error] 8096#9828: *1 upstream timed out (10060: A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond) while connecting to upstream, client: 127.0.0.1, server: localhost, request: "GET / HTTP/1.1", upstream: "http://127.0.0.1:8086/", host: "localhost:8080"
无法访问欢迎页面，是因为什么？