This error is issued when current of a motor is well below the average current. It seems current sensing circuit for one of the motor has gone defective.
Check the arm cables. Im affrraid that the cost of the folding arms is that we will be having a lot of issues in the log run by cables getting severed from the inside
Im having the same issue. Have the drone for 2 weeks now. The alert comes up as i lift off.
It seems as if its a common problem but not much documentation on it.This is the most comprehensive(somewhat)
So my questions are: The solution is just to get a replacement? Tighten the motors ? OR PRay