Sorry for the trouble. Please run the commands under
Administrator privileges. Mentioned commands would be:
sudo dfu-programmer at32uc3a3256s erase
sudo dfu-programmer at32uc3a3256s flash --suppress-bootloader-mem
sudo dfu-programmer at32uc3a3256s launch
The device will not connect to Nitrokey App as long as it is in
Update mode. If the firmware was not erased with
flash commands earlier,
launch command should make it running again as if nothing happend.
sudo term is mentioned in instructions, but it appears to me now this is not clear enough. Extension of it with a some Linux concepts explanation and with a screenshots of executing the procedure step-by-step should be helpful.
This is (probably) again caused by running the update with
User privileges (as opposed to
Administrator ones). Perhaps this should be stressed more in the guide.