Describes the cause and action for error messages.
Error Message(English)：
proxy error
How to Troubleshoot 'Cannot Connect to Proxy' Error ...
https://stackoverflow.com/questions/52937886/how-to-troubleshoot-cannot-connect-to-proxy-error-aws-s・・・
Proxy error 502 aws after configuring .ebextensions
https://stackoverflow.com/questions/46941791/proxy-error-502-aws-after-configuring-ebextensions
AWS EC2 responds with HTTP 502 when trying to upload ...
https://stackoverflow.com/questions/38909660/aws-ec2-responds-with-http-502-when-trying-to-upload-me・・・
Getting 502 proxy error after deploying app to AWS
https://stackoverflow.com/questions/38288966/getting-502-proxy-error-after-deploying-app-to-aws
AWS-CLI利用に伴うエラー - スタック・オーバーフロー
https://ja.stackoverflow.com/questions/20726/aws-cli%E5%88%A9%E7%94%A8%E3%81%AB%E4%BC%B4%E3%81%86%E3・・・
How to Fix Amazon Prime HTTP Proxy Error? - The VPN Guru
https://thevpn.guru/amazon-prime-http-proxy-error-fix-workaround/
502 Proxy Error The proxy server received an invalid response from ...
https://www.youtube.com/watch?v=0XQhiFCXnMw
https://www.youtube.com/watch?v=0XQhiFCXnMw
【Apache】http 通信を https 通信に変換してプロキシする - きゃまなかのブログ
http://techblog.kyamanak.com/entry/2018/04/29/225347