Github cannot access github website

Describes the cause and action for error messages.

Error Message(English)：
cannot access github website

Resolution

Access permissions on GitHub - GitHub Help
https://help.github.com/en/articles/access-permissions-on-github

Error: Repository not found - GitHub Help
https://help.github.com/en/articles/error-repository-not-found

Solved: Cannot access nested pages - GitHub Community Forum
https://github.community/t5/GitHub-Pages/Cannot-access-nested-pages/td-p/5081

Solved: index.html not working - GitHub Community Forum
https://github.community/t5/GitHub-Pages/index-html-not-working/td-p/1266

How to get your website online easily with Github ? codeburst
https://codeburst.io/how-to-get-your-website-online-easily-with-github-44ea5ce2997d

How to fix page 404 on Github Page? - Stack Overflow
https://stackoverflow.com/questions/11577147/how-to-fix-page-404-on-github-page

GitHubのmasterブランチをWebページとして公開する手順（GitHub Pages ...
https://qiita.com/tonkotsuboy_com/items/f98667b89228b98bc096

Host on GitHub | Hugo
https://gohugo.io/hosting-and-deployment/hosting-on-github/

Power BI で GitHub に接続する - Power BI | Microsoft Docs
https://docs.microsoft.com/ja-jp/power-bi/service-connect-to-github