Then launch and click on " Installation " troubleshooting then, in the program list, search for UEPrerequisites or whatever it’s called on your computer, then fix it, and wait. After a while (10mins for me) it say it’s done then don’t close the window. It ask for you to try again to launch the program.
For me at this point it’s solved. If not for you than say the the utility program it’s not solved and it will try to fix other things.