I'm trying to connect to our corporate VPN after updating to Monterey, but the client fails with error 0x800704cf. I've reinstalled the client and rebooted, but nothing changes.

Make sure you have the latest version of the VPN client that supports Monterey. Also check System Preferences → Security & Privacy → Privacy → Full Disk Access and add the VPN app.

Added the app to Full Disk Access, still the same error. Any other ideas?