Can't run demo-0.6.2.exe

[unreal79]

Just the simple task is failing with the error:

Error

l2df.lua:3811: bad argument #2 to 'm' (string expected, got nil)


Traceback

l2df.lua:1641: in function 'handler'
[C]: in function 'm'
l2df.lua:3811: in function 'register'
data/scenes/arena.lua:723: in main chunk
[C]: in function 'h'
l2df.lua:2932: in function 'requireFolder'
l2df.lua:4433: in function 'load'
l2df.lua:4428: in function 'SceneManager'
main.lua:85: in function 'load'
l2df.lua:3066: in function <l2df.lua:3066>
(tail call): ?
[C]: in function 'xpcall'
[C]: in function 'xpcall'

Win10x64 here with latest updates. All modern games run OK.