I have almost the same issue with my Korg Minipops 7. The unit works as normal with the unipulse off. But with trying to use the unipulse I get no results. No trigger nor sync. I double checked the installation – is ok.
The blue light is not blinking when I try to send MIDI configuration file (pressing the button for longer then 3 sec didn’t help). The blue LED it is just on. I also think that something is wrong with the board.