Because -6023 is often a file corruption issue, the most reliable fix is to completely wipe Parsec from your system and reinstall it fresh. A standard uninstall often leaves behind the corrupted config files.
This resolves the issue for roughly 80% of users experiencing the -6023 code. -6023 parsec error
Even if you disable third-party antivirus, the Windows Firewall can still block the necessary ports for the handshake. Because -6023 is often a file corruption issue,
This error message originated from the old Infocom text adventure games, specifically from the Z-code interpreter. When a player would try to move in a direction that wasn't possible or wasn't implemented in the game, the interpreter would display a cryptic error message: "-6023 parsec error". -6023 parsec error