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

If you are using smart card/yubikey to store your GPG key and you set the signkey of git config by the key stored in the card (and all the answer above seem not to resolve your issue), your blocked PIN of the card might be the root cause of this issue.

To check the blocked PIN:

gpg --card-status

If the counter is similar to

Reader ...........: Yubico YubiKey
PIN retry counter : 3 0 3

Then your PIN is blocked (after 3 unsuccessful tries).

To unblock the PIN:

gpg --card-edit
gpg/card> admin
Admin commands are allowed

gpg/card> passwd
gpg: OpenPGP card no. … detected

1 - change PIN
2 - unblock PIN
3 - change Admin PIN
4 - set the Reset Code
Q - quit

Your selection? 2
PIN unblocked and new PIN set.

1 - change PIN
2 - unblock PIN
3 - change Admin PIN
4 - set the Reset Code
Q - quit

Your selection? q