Error after disabling helpview

[NStefan002]

When disabling helpview and then trying to open a new help buffer, I get the following error:

Error detected while processing BufWinEnter Autocommands for "<buffer=3>":
Error executing lua callback: ...2/.local/share/nvim/lazy/helpview.nvim/ftplugin/help.lua:43: attempt to index field 'options' (a nil value)
stack traceback:
        ...2/.local/share/nvim/lazy/helpview.nvim/ftplugin/help.lua:43: in function <...2/.local/share/nvim/lazy/helpview.nvim/ftplugin/help.lua:32>

I can reproduce it with this minimal config:

local lazypath = vim.fn.stdpath("data") .. "/lazy/lazy.nvim"
if not (vim.uv or vim.loop).fs_stat(lazypath) then
	vim.fn.system({
		"git",
		"clone",
		"--filter=blob:none",
		"https://github.com/folke/lazy.nvim.git",
		"--branch=stable", -- latest stable release
		lazypath,
	})
end
vim.opt.rtp:prepend(lazypath)

require("lazy").setup({
	{
		"OXY2DEV/helpview.nvim",
		lazy = false,
		dependencies = {
			"nvim-treesitter/nvim-treesitter",
		},
	},
}, {})

1. copy the above code into repro.lua
2. run nvim -u repro.lua
3. :h news
4. :Helpview disableAll
5. :h help