Describes the cause and action for error messages.
Error Message(English)：
npm github not accessible
Error: Repository not found - GitHub Help
https://help.github.com/en/articles/error-repository-not-found
Can't install npm dependency from git repository ・ Issue #1013 ・ zeit ...
https://github.com/zeit/now-cli/issues/1013
GitHubに二段階認証を設定した後にGit操作できない時の解決策 - Qiita
https://qiita.com/kitoko552/items/3f45de6c876c638b690d
npm のインストール時にリモート git リポジトリを読み取れない ? CircleCI ...
https://support.circleci.com/hc/ja/articles/360009699913-npm-%E3%81%AE%E3%82%A4%E3%83%B3%E3%82%B9%E3・・・
Gitで「fatal: unable to access The requested URL returned error: 403 ...
https://www.virtual-surfer.com/entry/2018/04/13/190000
How to use private Github repo as npm dependency - Stack Overflow
https://stackoverflow.com/questions/28728665/how-to-use-private-github-repo-as-npm-dependency
Solved: Draft Pull Requests not available? - GitHub Community Forum
https://github.community/t5/How-to-use-Git-and-GitHub/Draft-Pull-Requests-not-available/td-p/19139
git - the simple guide - no deep shit!
http://rogerdudler.github.io/git-guide/
GitHub Status
https://www.githubstatus.com/