Git error - gpg failed to sign data

Question

I just started using git and I install git and gpg via homebrew. For some reason, I get this error when i do git commit I looked at so many other stackoverflow

Answer 1

I experienced this problem after upgrading to gnupg 2.x. It would seen that gpg2 is referencing keys differently: I still had signingkey = ABC98F11 (gpg v1 setting) in my ~/.gitconfig. The key identifiers for gpg2 are longer. Look them up with gpg --list-secret-keys