Project creator can only handle 7-bit ASCII

I’ve installed Unreal on a Swedish Windows machine where the default administrator account is named “Administratör” (Note dots above ‘o’ which makes a national character). I must say I’m stunned by the fact that still in 2021 developers hasn’t learned that there are other VALID characters in the alphabet than what’s in 7-bit ASCII !!!
Because when the project creator runs I get the following fatal error message

c1xx: fatal error C1083: Cannot open compiler intermediate file: ‘C:\Users\Administrat??r\Documents\Unreal Projects\GrabIT_1\Intermediate\Build\Win64\GrabIT_1Editor\Development\Engine\SharedPCH.Engine.ShadowErrors.h.pch’: No such file or directory

If sw for some reason only can handle 7-bit ASCII then it has to inform user about this during installation. Otherwise it has to support the full character set. Come on! Unicode was invented 1980. Isn’t it time to learn to use it?