Failed to connect to github.com port 443 after 21059 ms: Couldn't connect to server

当在上传或更新代码时遇到"Failed to connect to github.com port 443 after 21059 ms: Couldn't connect to server"的错误提示时，这通常是由于无法连接到github.com服务器所导致的。这个问题可能是由几种原因引起的，其中一种可能是因为开启了代理。解决这个问题的方法如下：
1. 关闭代理：关闭系统或者网络设置中的代理设置。
2. 检查代理端口是否与git端口一致：在网络设置中查看代理的端口号是否与git所使用的端口号一致，如果不一致，可以尝试修改代理的端口号以与git端口一致。
如果以上方法无法解决问题，还可以尝试检查网络连接是否正常，或者尝试通过其他网络环境连接github.com。希望这些方法能够帮助你解决问题。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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