[Solved] How to enable Reverse Alt+Tab


I recently installed the latest LTS version of Ubuntu MATE and I can't enable/use the combination to switch between windows in reverse order. Regular works, but reverse doesn't.
I tried running
gsettings set org.mate.Marco.global-keybindings switch-windows-all-backward '<Alt><Shift>Tab'
but didn't work. In the Keyboard Shortcuts menu I see it's possible to add shortcuts, but not sure what command should be.

Thanks in advance

Solved, I had to switch keyboard layouts and it was causing conflicts...