neoscroll.nvim/lua/neoscroll/init.lua:198: Vim(normal):E471: Argument required: normal!

[hungrybirder]

commit id=4cb8fe7c0e0cbed2fd0852e5ee7f4970359c9650
I open README.txt,
type
I get an error neoscroll.nvim/lua/neoscroll/init.lua:198: Vim(normal):E471: Argument required: normal!

It works well by using commit id=a1c9db5a3dcc900d98bc2efb6c10d3a8b08e42ef

My neoscroll config

require('neoscroll').setup({
    mappings = {'<C-u>', '<C-d>', '<C-b>', '<C-f>',
                '<C-y>', '<C-e>', 'zt', 'zz', 'zb'},
    hide_cursor = true,          -- Hide cursor while scrolling
    stop_eof = true,             -- Stop at <EOF> when scrolling downwards
    respect_scrolloff = false,   -- Stop scrolling when the cursor reaches the scrolloff margin of the file
    cursor_scrolls_alone = true, -- The cursor will keep on scrolling even if the window cannot scroll further
    easing = false,              -- easing_function will be used in all scrolling animations with some defaults
    easing_function = function(x) return math.pow(x, 2) end -- default easing function
})

local t = {}
-- Syntax: t[keys] = {function, {function arguments}}
t['<C-u>'] = {'scroll', {'-vim.wo.scroll', 'true', '8'}}
t['<C-d>'] = {'scroll', { 'vim.wo.scroll', 'true', '8'}}
t['<C-b>'] = {'scroll', {'-vim.api.nvim_win_get_height(0)', 'true', '7'}}
t['<C-f>'] = {'scroll', { 'vim.api.nvim_win_get_height(0)', 'true', '7'}}
t['<C-y>'] = {'scroll', {'-0.10', 'false', '20'}}
t['<C-e>'] = {'scroll', { '0.10', 'false', '20'}}
t['zt']    = {'zt', {'7'}}
t['zz']    = {'zz', {'7'}}
t['zb']    = {'zb', {'7'}}

require('neoscroll.config').set_mappings(t)

[bangedorrunt]

This is neovim bug as mentioned in #11 and #28, to fix it use vim.opt_local.scrolloff = 0, and set use_local_scrolloff = true in your require('neoscroll').setup()

@karb94, I found this issue persists when restore a session.