dji phantom 4 pro forward vision sensor calibration error

Hello everyone there, i would be greatful if some one can help me with my dji phantom 4 pro forward vision sensor calibration error, i have many times calibrated it with my computer and all goes great and after I go to fly for a test when Im on the air few minutes then it gives forward vision sensor calibration error again, please any idea?
thank you in advance

  1. something blocking the sensor - clean
  2. make sure the black foam around the sensor is not obstructing the sensor - use a match stick to "poke " it back in place
  3. if your drone has crashed / heavy landing / your frame may be bent - check that all 4 sensors are symmetrical & centred in the window
  4. during calibration you may notice if one of the sensor camera is out of position.