rmsigchks.py error

gistfile1.txt

Alfonsos-iMac:ipwndfu dingo$ sudo ./ipwndfu -p
Password:
*** checkm8 exploit by axi0mX ***
Found: CPID:8015 CPRV:11 CPFM:03 SCEP:01 BDID:0E ECID:001949100484483A IBFL:3C SRTG:[iBoot-3332.0.0.1.23]
Device is now in pwned DFU Mode.
(0.87 seconds)
Alfonsos-iMac:ipwndfu dingo$ python ./rmsigchks.py 
*** SecureROM Signature check remover by Linus Henze ***
*** Fake CA patch by L0W_P1X3L ***
Found: CPID:8015 CPRV:11 CPFM:03 SCEP:01 BDID:0E ECID:001949100484483A IBFL:3C SRTG:[iBoot-3332.0.0.1.23] PWND:[checkm8]
Applying patches...
Traceback (most recent call last):
  File "./rmsigchks.py", line 97, in <module>
    main()
  File "./rmsigchks.py", line 84, in main
    pdev.write_memory(k, config.patches[k])
  File "/Users/dingo/ipwndfu/usbexec.py", line 44, in write_memory
    def write_memory(self, address, data):         self.command(self.cmd_memcpy(address, self.cmd_data_address(3), len(data)) + data, 0)
  File "/Users/dingo/ipwndfu/usbexec.py", line 106, in command
    response = device.ctrl_transfer(0xA1, 2, 0xFFFF, 0, response_length + 1, CMD_TIMEOUT).tostring()[1:]
  File "/Users/dingo/ipwndfu/usb/core.py", line 1043, in ctrl_transfer
    self.__get_timeout(timeout))
  File "/Users/dingo/ipwndfu/usb/backend/libusb1.py", line 883, in ctrl_transfer
    timeout))
  File "/Users/dingo/ipwndfu/usb/backend/libusb1.py", line 595, in _check
    raise USBError(_strerror(ret), ret, _libusb_errno[ret])
usb.core.USBError: [Errno 5] Input/Output Error
Alfonsos-iMac:ipwndfu dingo$