I have owned a Mavic 2 Pro for approximately 4 years. Suddenly it is impossible to complete the “Visual Sensor Calibration” successfully. Today I repeated the calibration procedure using DJI Assistant (v. 2.1.40), The procedure seems to move smoothly for all sensors (front, rear, down, right, left), then the app goes into “Downloading…”, then “Transmitting…” and then “Updating…”, with the respective completion indicators reaching 100% and then I constantly get the message “Calibration failed - 1-2 rms (0.92-0.00-0.50)”. The drone has no crash landings, only one hard one.
Just to confirm, you’re using the “Consumer Drones Series” version of Assistant 2, right? It looks like it from the version number you listed, but asking just in case.
If so, you might try cleaning the lenses of all the sensors and/or using a different computer monitor, or adjusting the resolution on it, as well as taking extra care during the process. The failure is happening when the software is crunching the numbers.