C:\Users\myapp>truffle unbox
This directory is non-empty...
? Proceed anyway? (Y/n)
Starting unbox...
=================
? Proceed anyway? Yes
√ Preparing to download box
× Downloading
Unbox failed!
× Downloading
Unbox failed!
Error: Error connecting to github.com. Please check your internet connection and try again.
at C:\Program Files\nodejs\node_global\node_modules\truffle\build\webpack:\packages\box\dist\lib\utils\unbox.js:45:1
at Generator.throw (<anonymous>)
at rejected (C:\Program Files\nodejs\node_global\node_modules\truffle\build\webpack:\packages\box\dist\lib\utils\unbox.js:6:41)
at processTicksAndRejections (internal/process/task_queues.js:95:5)
Truffle v5.3.10 (core: 5.3.10)
Node v14.17.1其中报错Error connecting to github.com
应该是访问不到境外的域名服务器，试下复制下面配置到hosts文件(C:\Windows\System32\drivers\etc\hosts)
# GitHub Start
192.30.255.112 gist.github.com
192.30.255.112 github.com
192.30.255.112 www.github.com
151.101.56.133 avatars0.githubusercontent.com
151.101.56.133 avatars1.githubusercontent.com
151.101.56.133 avatars2.githubusercontent.com
151.101.56.133 avatars3.githubusercontent.com
151.101.56.133 avatars4.githubusercontent.com
151.101.56.133 avatars5.githubusercontent.com
151.101.56.133 avatars6.githubusercontent.com
151.101.56.133 avatars7.githubusercontent.com
151.101.56.133 avatars8.githubusercontent.com
151.101.56.133 camo.githubusercontent.com
151.101.56.133 cloud.githubusercontent.com
151.101.56.133 gist.githubusercontent.com
151.101.56.133 marketplace-screenshots.githubusercontent.com
151.101.56.133 raw.githubusercontent.com
151.101.56.133 repository-images.githubusercontent.com
151.101.56.133 user-images.githubusercontent.com
# GitHub End
找个代理，爬个楼，翻下墙
git config --global url."git://".insteadOf https://
有一个最好的办法就是将你的网络换成无线WIFI
望采纳，谢谢