iPhone SE (2016) NoBackend Error. Libusb is installed

jonah@Jonahs-MBP ipwndfu-master % ./ipwndfu -p
Traceback (most recent call last):
File "./ipwndfu", line 48, in <module>
device = dfu.acquire_device()
File "/Users/jonah/Downloads/ipwndfu-master/dfu.py", line 16, in acquire_device
for device in usb.core.find(find_all=True, idVendor=0x5AC, idProduct=0x1227, backend=backend):
File "/Users/jonah/Downloads/ipwndfu-master/usb/core.py", line 1263, in find
raise NoBackendError('No backend available')
usb.core.NoBackendError: No backend available