Could not parse --management option

I am trying to get PLAP to work using OpenVPN 2.6.7 on Windows 10.

It is enabled in the GUI settings, the services are running, I have rebooted, the connection is in the config-auto directory and it is shown in the GUI under "Persistent Profiles". However, I don't see any PLAP on the login screen, and I get this error when trying to start it via the GUI:

Could not parse --management option in <C:\Program Files\OpenVPN\config-auto\\IPFire_prebootIPFire_preboot.ovpn>.
Attaching to auto-started connections require --management option in the config file.

btw: The correct file should be "...\config-auto\IPFire_preboot\IPFire_preboot.ovpn". Seems like some variable is misplaced.

Config file has been copied from the one that I use interactively to connect to the company. Renamed so it is not a duplicate and appended this:

management 127.0.0.1 1200 stdin
management-query-passwords
management-hold

Connecting via telnet is not possible (Connection refused).

Start by reproducing the Windows GUI flow with the config-auto file at the path shown in the report and OpenVPN 2.6.7. Inspect how the GUI builds that path and parses the management options. Done means the generated path points to the intended .ovpn file and the management option is accepted without the reported error.