Somewhat new to ghcmod-vim.
I installed ghcmod with stack, and tried to do a :GhcModType on a function in a stack project, and it keeps telling me that

ghcmod#command#type: Cannot guess type

Even though my project builds fine. Even on a very basic standalone file in the same directory, I'm still geting this error. I have ghcmod installed via stack at ~/.local/bin, which is on my PATH. I'm somewhat new here, so I'm not sure whether it's a problem with my ghcmod, with my PATH, or with my ghcmod-vim.
All the best