Kleopatra: "# Warning: error reading existing file /c/Users/<USER_NAME>/.gnupg/S.gpg-agent
: Operation not supported"
Indicates that GPG (GNU Privacy Guard) is having trouble accessing the GPG agent's socket file. This typically happens when there's a conflict between different GPG installations or when the user's environment isn't correctly configured for GPG to access the agent.
- Different GPG versions or packages:
You might have GPG installed through different sources (e.g., Git Bash and GnuPG4Win) and they might not be compatible or recognize each other's agent.