Vim starts with an error after installation

[FledgeXu]

nvim version:

NVIM v0.9.5
Build type: Release
LuaJIT 2.1.1703358377

   system vimrc file: "$VIM/sysinit.vim"
  fall-back for $VIM: "/opt/homebrew/Cellar/neovim/0.9.5/share/nvim"

Run :checkhealth for more info

Config:

    {
        'jedrzejboczar/exrc.nvim',
        dependencies = { 'neovim/nvim-lspconfig' },     -- (optional)
        config = true,
        opts = { --[[ your config ]] },
    },

Error message:

Error detected while processing VimEnter Autocommands for "*":
Error executing lua callback: ...dge/.local/share/nvim/lazy/exrc.nvim/lua/exrc/loader.lua:230: attempt to call field 'joinpath' (a nil value)
stack traceback:
        ...dge/.local/share/nvim/lazy/exrc.nvim/lua/exrc/loader.lua:230: in function 'on_vim_enter'
        ...ledge/.local/share/nvim/lazy/exrc.nvim/lua/exrc/init.lua:82: in function <...ledge/.local/share/nvim/lazy/exrc.nvim/lua/exrc/init.lua:81>

[FledgeXu]

After some digging up, I found vim.fs.joinpath is a neovim-nightly feature, Vim 0.9 hasn't supported it.

[FledgeXu]

Here is a simple fix:
mrcjkb/rustaceanvim#10

[jedrzejboczar]

Thanks and sorry for late fix