Super key

I installed archlabs with ‘xfce’ and then installed ‘bspwm’ manually with ‘sudo pacman -S bspwm’
I configure it ‘chmod u + x ~ / .config / bspwm / bspwmrc’ etc etc, and when I change the session to bspwm the ‘super key’ (mod key) key does not work (sorry for my bad english)