Fuzzy Search in fish with fzf

I had installed fzf some time ago. But default key ** for invoking fzf did not work with fzf. Upon searching, I came across couple of options. Of those, I chose the one with active development. As of this writing, the last commit was 11 days ago. Very active, I would say. 😄 Installation instruction said fisher install PatrickF1/fzf.fish but when tried, I got an error: fisher: unknown flag or command "install" 🤔