gpg: can't connect to the agent: IPC connect call failed

[p2poolmining]

• [ X] I was not able to find an open or closed issue matching what I'm seeing

Setup

• Which version of Git for Windows are you using? Is it 32-bit or 64-bit?

$ git --version --build-options
git version 2.24.1.windows.2
cpu: x86_64
built from commit: 992f0773022527b1b0cb1e0c13aec97dd5248053
sizeof-long: 4
sizeof-size_t: 8

• Which version of Windows are you running? Vista, 7, 8, 10? Is it 32-bit or 64-bit?

$ cmd.exe /c ver

Microsoft Windows [Version 10.0.18363.535]

• What options did you set as part of the installation? Or did you choose the
  defaults?

# One of the following:
> type "C:\Program Files\Git\etc\install-options.txt"
> type "C:\Program Files (x86)\Git\etc\install-options.txt"
> type "%USERPROFILE%\AppData\Local\Programs\Git\etc\install-options.txt"
$ cat /etc/install-options.txt

Editor Option: Nano
Custom Editor Path:
Path Option: Cmd
SSH Option: OpenSSH
Tortoise Option: false
CURL Option: OpenSSL
CRLF Option: CRLFAlways
Bash Terminal Option: MinTTY
Performance Tweaks FSCache: Enabled
Use Credential Manager: Enabled
Enable Symlinks: Disabled
Enable Builtin Interactive Add: Disabled

• Any other interesting things about your environment that might be related
  to the issue you're seeing?

Also running GPG4Win 3.1.11

Gpg4win 3.1.11 contains:
    
GnuPG 2.2.17
Kleopatra 3.1.8
GPA 0.10.0
GpgOL 2.4.2
GpgEX 1.0.6
Kompendium (de) 4.0.1
Compendium (en) 3.0.0

Details

• Which terminal/shell are you running Git from? e.g Bash/CMD/PowerShell/other

Bash

• What commands did you run to trigger this issue? If you can provide a
  Minimal, Complete, and Verifiable example
  this will help us understand the issue.

$ gpg --list-secret-keys --keyid-format LONG

• What did you expect to occur after running these commands?

expected to receive a list of the existing keys

• What actually happened instead?

Received error...

gpg: can't connect to the agent: IPC connect call failed

• Additional Details

This is a new machine, after installing GPG4Win, I exported the keys from the old windows 7 machine into Kleopatra on the new Windows 10 machine. The import worked fine and I can see a list of the keys using Powershell.

I have tried everything that I can think of to get this to work, but I am stumped now.

[dscho]

My guess is that this issue has something to do with Git for Windows shipping with its own version of GNU Privacy Guard. Most likely it cannot communicate with GPG4Win.