The package assumes the presence of libfontconfig on your path, see https://github.com/dcjones/Fontconfig.jl/blob/master/src/Fontconfig.jl
This is clearly not the case on Windows, which you appear to be using based on your C:\Users package path. The package author has not done the basic courtesy of putting a note in the package readme that it makes this assumption and does not support Windows. You should suggest adding such a note to the package readme with a pull request. Though since libfontconfig is a fairly well known library, I suspect it would be fairly simple to use WinRPM to obtain a compiled version of the library automatically for Windows users.
