Since I've had my MS, I have been charging it on a 50 amp 6-50 plug with good success. The standard green blinking light indicated charging status. Today I plugged in and a blue blinking light at the charging port came on. My app indicated that the unit was not charging. I read that a blue blinking light means that the unit s communicating. So I left it in for about 20 minutes with no change. What does the blue blinking light mean? What can I do to regain charging my car?