Setting the object does not work when added to the scene. Also, the return of actions Ctrl + Z does not work. Re-entering the program does not help. How to fix? Version 2.79
Ok, so I don't know what causes it, but I had the same issue on 2.80, most probably after installing or enabling add-ons. Problem is, no amount of getting rid of them fixed the problem. I'd suggest you go to your blender conf directory, back it up, remove what's in the config directory and restart it. Hopefully you didn't customize it too much. Config is on c:\users\\App Data\Blender Foundation\Blender\ (on Windows).