Having the same problem.  Following this thread.  Please fix soon!

Same problem here.. July 6 and no fix yet and need to calibrate vision sensors.

All. Post #2 has a link to another post dealing with the issue. It was resolved March 27, 2019 with a software release. Here's a link to the post with the fix. Best regards to all.

https://forum.dji.com/forum.php?mod=redirect&goto=findpost&ptid=183372&pid=1808391

DJI Paladin Posted at 3-13 09:59
Hi PonyRide933, sorry for the inconvenience. As mentioned on post #18, our related team was able to locate the cause of this concern and we're currently working on it. As of this time, you can use DJI Assistant 2 using a Mac or Windows 7 or 8 PC. I will notify you once the issue is fixed. Appreciate your patience and support

BULL CRAP! It won't install on windows 7! I'm SO FRUSTRATED with DJI CRAP Software. Seriously, DJI is SUPPOSED to be the LEADER and they can't even properly sign their drivers and build their software to world recognized standards, this is Bull Crap!, just trying to pinch every penny! INEXCUSABLE!!!!