Starting today, I am encountering the same issue (see attachment). I wasn't even able to take a screenshot, I had to do a picture with my phone.
When I try to start the game normally, nothing happens and this message appears when I try to run the program as an administrator. I have the 1.5 version of the game, the "old" version, not Steam.
I've tried to take privileges, to drop security and so on, nothing helps. Did anyone found a solution for this? I mean a real solution, not a workaround.
https://ibb.co/XVsrdLP
It's funny, I am supposed to be the administrator of my PC, good or bad, but it seems there is a some big brother in a higher plane watching over my safety.