This repo is a custom made configuration of neovim version 0.7+, if it doesn't work on your machine, try upgrading neovim to version 0.7+, if it still does not work, please move on....
If you don't have packerinstall on your neovim editor...
try the command """
git clone --depth 1 https://github.com/wbthomason/packer.nvim\ ~/.local/share/nvim/site/pack/packer/start/packer.nvim
"""