pynrfjprog not working on Raspberry Pi 4

[Martí]

Hi,

I come from here: https://devzone.nordicsemi.com/f/nordic-q-a/80874/nrfjprog-not-working-on-raspberry-pi-4/336129

But for me the nrfjprog comand works fine:

pi@raspberrypi:~/Desktop/repo/gateway-software/gateway $ nrfjprog -f NRF51 --program ./firm.hex --chiperase
Parsing image file.
Verified OK.

However when I try to upload an hex with the pynrjprog pip module I get the following error:

  File "/home/pi/Desktop/repo/gateway-software/gateway/OTA.py", line 116, in updateBin
    api.open()
  File "/home/pi/Desktop/repo/gateway-software/productionVenv/lib/python3.7/site-packages/pynrfjprog/LowLevel.py", line 177, in open
    raise APIError(result, error_data=self.get_errors())
pynrfjprog.APIError.APIError: An error was reported by NRFJPROG DLL: -254 INTERNAL_ERROR.

This is the zone of the code at which it fails:

api = LowLevel.API(LowLevel.DeviceFamily.UNKNOWN)
api.open()

I'm runing pynrfjprog version 10.15.1