Describes the cause and action for error messages.
Error Message(English)：
unable to connect to github port 443
GitでProxyの設定を行ってエラー回避する方法 | gitの使い方講座
https://git-manual.net/git-proxy-error/
GitHub - failed to connect to github 443 windows/ Failed to ...
https://stackoverflow.com/questions/18356502/github-failed-to-connect-to-github-443-windows-failed-t・・・
Failed to connect to github.com port 443: Timed out
https://stackoverflow.com/questions/45047891/failed-to-connect-to-github-com-port-443-timed-out
Failed to connect to github 443
https://stackoverflow.com/questions/29333319/failed-to-connect-to-github-443
Could not push--Failed to connect to github.com port 443 ...
https://stackoverflow.com/questions/41196888/could-not-push-failed-to-connect-to-github-com-port-443・・・
Github error: Failed to connect to 443 port
https://stackoverflow.com/questions/34021288/github-error-failed-to-connect-to-443-port
Improve ease of configuring Git to work with corporate proxy ・ Issue ...
https://github.com/desktop/desktop/issues/2789
Unable to access repository over HTTPS ・ Issue #3713 ... - GitHub
https://github.com/desktop/desktop/issues/3713
Using SSH over the HTTPS port - GitHub Help
https://help.github.com/en/articles/using-ssh-over-the-https-port