in neovim config , got " attempt to call field 'unpack' (a nil value)" when attempting to open current directory with ":edit ."

full error:

```
Failed to run `config` for barbar.nvim

/home/n/.config/nvim/lua/plugins/barbar.lua:13: attempt to call field 'unpack' (a nil value)

# stacktrace:
  - lua/plugins/barbar.lua:13 _in_ **config**
  - init.lua:16

```

also same error when opening with "nvim ." initially

