nrfjprog: JLinkARM.dll GetSN returned error '-1'

[Cabbage]

Hello,

I installed the new nrfjprog but it fails to write my nrf52 dongle:

ERROR: nrfjprog failed for an unknown reason. Run the same command again with ERROR: argument --log, contact Nordic Semiconductor and provide the generated ERROR: log.log file to them.

My J-Link version:
SEGGER J-Link Commander V6.20 
DLL version V6.20

the log file:

--------------------------------------------------------------------------------
./nrfjprog --reset --program ../../DFU/bootloader/nrf52832_xxaa_s132.hex --family NRF52 --log
nrfjprog verion 9.7.1
-------------------------------------------------------------------------------

FUNCTION: open_dll.
FUNCTION: open_dll.
FUNCTION: enum_emu_snr.
FUNCTION: enum_emu_snr.
FUNCTION: enum_emu_snr.
FUNCTION: enum_emu_snr.
FUNCTION: connect_to_emu_with_snr.
FUNCTION: connect_to_emu_with_snr.
FUNCTION: connect_to_emu_without_snr.
FUNCTION: enum_emu_snr.
Device "NRF52832_XXAA" selected.
JLinkARM.dll GetSN returned error '-1'.
FUNCTION: close_dll.
FUNCTION: close_dll.

Thanks, Sean

[endnode]

You probably don't have any SEGGER debugger attached to your machine (or it is not recognized/driver installed properly).