I had same problem using a all in one windows computer with monitor. Monitor sites at angle, like a stand alone picture frame. Then did with laptop with screen at 90 degree angle. And worked first time.Hello to all!
I have a problem with Phantom 4. Visual sensors are not calibrated. I tried to calibrate with DJI Assisstans 2 and manually calibrate DJI GO 4, but without result. Who knows what the problem is?