I recently installed MC Cruise on my 2015 Versys. Install was fine same worked a treat for two days. Now it does not work, the heat position indicator speed working and the side stand switch no longer operates as expected all at the same time.
Error code on MC Cruise says "clutch, neutral, distance wiring fault".
Any chance you have that email to post how to change the polarity?
Possibly this is what you experienced.