I’ve had this same error, but on startup of the Lumix. The zoom lens was stuck in its position. I disassambled it using the guide here on FixIt, it turned out that there is a fixed lens, which focusses the light onto the sensor. That had come loose (i suspect, because the camera got heated up in a hot room for some time). Fixed it, but unfortunately the loose lens had made scratches on the sensor. So my LX100 is working, but there is a small area in each photo with a image distortion :-(