Gpg4win 4.4.1 - can't connect to the keyboxd: IPC connect call failed

The following error message appeared after I tried to verify an ISO file:

Microsoft Windows [Version 10.0.26100.4946](c) Microsoft Corporation. All rights reserved.

C:\Users\gpg4me>gpg --verify e:\tails\tails-amd64-6.19.img.sig
gpg: assuming signed data in ‘e:\tails\tails-amd64-6.19.img’
gpg: Signature made 08/20/25 19:01:13 Japan Standard Time
gpg:                using EDDSA key 4FDE1D065B10343FBD642A14BC8BD3DAC9CD2979
gpg: can’t connect to the keyboxd: IPC connect call failed
gpg: error opening key DB: No Keybox daemon running 
C:\Users\gpg4me>

After googling, I discovered that there was a similar problem raised by some users way back in December 2021 and continuing into the early part of 2022.

GPG4Win 4.0 - Kleopatra - IPC Connect Call Failed

In that post, the owner of gpg4win, @aheinecke stated that versions 2.2.34 and 2.3 would contain the fix.

I would appreciate it if someone could help me out with this issue.

Hi,

usually keyboxd starts automatically but try gpg -K to start it.

Does your verification work after that?