I am fairly new to the Mavic Pro Platinum, which I purchased new about 2 months ago. No crashes at all and it has worked flawlessly until today. I went out to do some flying and testing of tap fly, course lock, etc. and as soon as I started it, I got a red warning about the forward vision system. I went ahead and attempted to enter tapfly, and it would not operate in Intelligent flight modes without the forward sensors. The sensors are perfectly clean. Then I tried the calibration several times as prompted ( moving the drone in a square in front of me as prompted ) unsuccessfully. Then I came home and attempted again in my driveway without success. Then I erased and reloaded the DJI GO 4 app and tried again....... no success. Any helpful hints out there? Much appreciated. [emoji1317]