I was flying over the river a month ago. By making a wrong move with my up and down stick the drone ,Mavic pro platinum, felt into the water. I dried the drone with a air dryer and then I put the drone in a bag with rice for 3days. After this I tried the drone , no problem at all. But a week later on my screen appears : takeoff error, check motors and props. Can somebody tell me what I can do?