No throttle or assist

[Jafo]

2 year old Rad Rover 6+ Full battery. The display goes through the check with no errors. Both displays seem normal. Twisted the throttle moved forward a few feet and stopped. Both display correctly. I turned it off and back on and with the same results. Tried to pedal it and assist isn't working either. I haven't any idea where to look first. Has anyone experienced this? Any help or ideas will be greatly appreciated.