So, I've got my P3P few days ago. Updated firmware on both bird and RC right after opening from the box. (RC didn't need any update though) Took it outside 3 times and each time after I start the unit, I get this error message. Then I try to plug the black cable back in by pressing the end. Although it looked like it was connected all the way in. Message disappears and I proceed to calibrate compass and start the motor and get this bird up in the sky and shoot some videos with no problem. Did this happen because I have never done IMU calibration after the firmware update? Contacted DJI Live Chat and the agent told me that this is a probably defective unit and advised me to contact them via email. Just sent an email and I'm wondering if anyone else has same issue.