Can't use GPIO pins on Sparky

I looking to use the GPIO buttons plugin on my USBridge (Sparky SBC).

From what I have read the Sparky GPIOs are supposed to be Raspberry Pi compatible so I thought it might work without any modification, but that doesn’t seem to be the case.
Actually, the plugin does not even save the settings properly.
I can select to turn on the play/pause function, select a pin to use and then click the save button. But the next time I open up the settings all the functions are set to off again.
Is there anything I can do to get this working, or does it just not work with the Sparky SBC?

Would be very grateful for any help with this problem.