I charged the battery, then hooked it up to the ESC/BMS and the controller.
I turn the Main Power on. I hear tones and the hand controller comes alive.
I short press and then press and hold. A red exclamation icon flashes in the middle of the screen and the controller vibrates, then both stop.
EDIT: Turns out the white throttle ‘peg’ was ever so slightly depressed, even with having actuated the system several times prior. I physically ‘pulled’ on the white stick and while it didn’t feel like it moved, the error stopped happening.
The exclimation point on startup is from the throttle being slightly engaged. When i got mine, the throttle lever was sticking on when released. I took it off and filed it so it was free to move.