Yes I had the same error as well. I had downloaded the precompiled .exe from Brad Lynch's install guide but the box was grayed out. So I downloaded another precompiled installer from somewhere else and in that version it worked fine (I first installed Forge normally).
I don't remember where I got the file but I uploaded it
here. I don't recommend downloading executables linked by random people on internet forums so run it through VirusTotal (I did already and it looks clean) or similar to assure yourself it's free of malicious code before running.