Describes the cause and action for error messages.
Error Message(English)：
gpg failed to sign the data
Gitでgpgのせいでコミットに失敗したときの対処 - Qiita
https://qiita.com/buch/items/09479c627e750126236a
gpg failed to sign the data fatal: failed to write commit object ...
https://stackoverflow.com/questions/39494631/gpg-failed-to-sign-the-data-fatal-failed-to-write-commi・・・
Git error: gpg failed to sign the data on Linux
https://stackoverflow.com/questions/52808365/git-error-gpg-failed-to-sign-the-data-on-linux
Git error - gpg failed to sign data
https://stackoverflow.com/questions/41052538/git-error-gpg-failed-to-sign-data
git - gpg onto mac osx: error: gpg failed to sign the data
https://stackoverflow.com/questions/41502146/git-gpg-onto-mac-osx-error-gpg-failed-to-sign-the-data
Generating a GPG key for git tagging
https://stackoverflow.com/questions/12061645/generating-a-gpg-key-for-git-tagging
Git error - gpg failed to sign data - Stack Overflow
https://stackoverflow.com/questions/41052538/git-error-gpg-failed-to-sign-data/41054093
Error: gpg failed to sign the data ・ Issue #24 ・ pstadler ... - GitHub
https://github.com/pstadler/keybase-gpg-github/issues/24
Atom fails to accept password to sign commit ・ Issue #1518 ... - GitHub
https://github.com/atom/github/issues/1518