the Mavic came up with a system error...
Downard Vision Sensor Error (e00002)
Hardware Malfunction. Contact DJI Support to arrange for repairs.
Vision System Error (e00002)
Restart Aircraft. Contact DJI Support if the problem persists.
Connecting to DJI Assistant 2 (for the first time) and running the sensor calibration showed that the upper camera was blank.

Any suggestions?
Downard Vision Sensor Error (e00002)
Hardware Malfunction. Contact DJI Support to arrange for repairs.
Vision System Error (e00002)
Restart Aircraft. Contact DJI Support if the problem persists.
Connecting to DJI Assistant 2 (for the first time) and running the sensor calibration showed that the upper camera was blank.

Any suggestions?