How to use VAD of ReSpeaker Mic Array v2.0?

Hi, im trying to use the VAD(Voice Active Detection) of ReSpeaker Mic Array v2.0, in the official web site
ReSpeaker Mic Array v2.0 - Seeed Wiki, but when i run the code i get the next error “File “C:\Users\StevenMendezChipatec\AppData\Local\Programs\Python\Python37\lib\site-packages\usb\”, line 1309, in find
raise NoBackendError(‘No backend available’)
usb.core.NoBackendError: No backend available” does anyone know what i need to do for using the VAD?