Error executing luv callback

[connorjcantrell]

After performing the git clone command provided in the readme, I'm getting the following error:

Error executing luv callback:
...ck/packer/start/plenary.nvim/lua/plenary/async/async.lua:14: The coroutine failed with this message: vim/shared.lua:489: s: expected string, got nil
stack traceback:
        [C]: in function 'error'
        ...ck/packer/start/plenary.nvim/lua/plenary/async/async.lua:14: in function 'callback_or_next'
        ...ck/packer/start/plenary.nvim/lua/plenary/async/async.lua:40: in function 'callback'
        ...ite/pack/packer/start/gitsigns.nvim/lua/gitsigns/git.lua:182: in function 'callback'
        ...k/packer/start/gitsigns.nvim/lua/gitsigns/subprocess.lua:66: in function <...k/packer/start/gitsigns.nvim/lua/gitsigns/subprocess.lua:52>