Communication Error Between Battery and Flight Controller

There is an imperfection in the communication between the batteries and the aerial electronics module.

Diagnosing:

1. Try a different battery to see if the problem is only with the certain battery. 
2. Check the prongs on the battery and the drone for possible corrosion or imperfections.
3. Check the signal cables that run from the rear board to the front board.
4. Check the aerial electronics module.
5. Check the Cable Distribution board.

Solutions:

1. Replace the one battery that was bad.
2. Downgrade and Reupdate the aircraft.
3. Replace the Power Board.
4. Replace the Signal Cables.
5. Replace the Aerial Electronics Module.
6. Replace the Cable Distribution Board.

Conclusion:

The bad part could be any of the above so make sure to give a thorough lookover.