Position control of M0, then error


I am testing my motor with Position control of M0(https://docs.odriverobotics.com/).
when connect my v3.4 board, then execution:
odrv0.axis0.requested_state = AXIS_STATE_FULL_CALIBRATION_SEQUENCE
when execution the following instruction, after about 2 seconds should hear a beep. Then the motor turn slowly in one direction for a few seconds, but don’t back in the other direction.
then the system error, error code is 255, why?