A genuine VCDS HEX-CAN cable should work perfectly fine, especially if its coming up on the list of FTDI devices on Nefmoto Flasher.
Might help if OP posts the log output.
Agreed.
It is worth noting that the vcds driver can conflict with the FTDI driver in some cases.
I found I had to do the following to recover:
1) uninstall both VCDS and FTDI drivers
2) install VCDS drivers and disable intelligent mode
3) install FTDI driver