Awesome wm : unable to use lain plugins

I’m trying to setting up awesome wm

I have to use lain (GitHub - lcpz/lain: Awesome WM complements) , because it has the layouts I need
But it doesn’t works, the extra features (layout etc) don’t appear.

How can I setting up lain to work properly?

Thanks in advance

I did not try lain, but it is old in the Manjaro repo.

Try to install lain-git from AUR.

Already tried, it doesn’t work

Also, lain is on our community ISO

It doesn’t work in the ISO too