How to add a custom plugin about nvimdots HOT 2 CLOSED

Because your new plugin's installation config is not correct.
First of all, this plugin's git repo is jalvesaq/Nvim-R rather than jalvesaq/Nvim-R.nvim.
Secondly, you need to learning how to use Packer.nvim to manage plugins: quickstart
Thirdly, I notice that this plugin is about r lang so you'd better put it in lang module.
So the correct config is like this:

lang["jalvesaq/Nvim-R"] = {opt = true, ft = "r", branch = "stable"}

Additionally, you don't need to add its config in config.lua because this section doesn't occur in its readme.
Btw, you can read its doc in nvim by :h Nvim-R.

from nvimdots.

Great, it works now, Thanks!

from nvimdots.