I'm still grounded by this recent upgrade, has any one found a combination of firmware that works? I had zero issues with my M600 Pro until the 27th of January, when I was unable to take off. Now I'm getting IMU calibration errors on top of the firmware failures. Is there anone who knows what's going on at DJI?  

We have the same problem. Was forced to update the controller firmware then it wouldn’t connect so had to relink the controller then it says Version Mismatch update all modules. Looking at the IMUs the 2&3 May me out as well