soulmask server installation failed

[exasorz]

I tried to install soulmask server using the following procedure, but an error occurs when copying the config file and the installation fails.
https://linuxgsm.com/servers/smserver/

Copying Soulmask Configs
=================================
Copying default configs.
creating  config directory.
mkdir: cannot create directory '': No such file or directory
copying config file [  ]: cp: option '--update' doesn't allow an argument
Try 'cp --help' for more information.
FAIL

What should I do to resolve this issue?

Environment

Debian 12.8

[exasorz]

The required key did not seem to be present in the _default.cfg.
Is it no longer maintained?

soulmask

systemdir="${serverfiles}/WS"
executabledir="${systemdir}/Binaries/Linux"
executable="./WSServer-Linux-Shipping"

othergame (palworld)

systemdir="${serverfiles}/Pal"
executabledir="${systemdir}/Binaries/Linux/"
executable="./PalServer-Linux-Shipping"
servercfgdir="${serverfiles}/Pal/Saved/Config/LinuxServer"
servercfg="PalWorldSettings.ini"
servercfgdefault="PalWorldSettings.ini"
servercfgfullpath="${servercfgdir}/${servercfg}"