Wired Xbox is recognised by Shadow, but selection is greyed out (Apple M1)

Hi all, 

Loving Shadow, mostly for my Quest 2, but I also love 2D gaming. My trusty old wired Xbox controller is picked up by the Shadow app, but nothing comes up in the controller list, and I can't click to select it, it is greyed out. Why on earth is this happening, and how can I fix it? 

Thanks in advance