Attempt to index nil with 'root'?

CorePackages.Packages._Index.RoactCompat-a406e214
-4230f473.RoactCompat.RoactTree:130: attempt to index nil with 'root'
 -  Client - RoactTree:130

im trying to Remove the default loading screen it work fine last time but now im facing this problem. Anyone help? i tried to search but no result. Code:

local Players = game:GetService("Players")
local ReplicatedStorage = game:GetService("ReplicatedStorage")
local ReplicatedFirst = game:GetService("ReplicatedFirst")
local ContentProvider = game:GetService("ContentProvider")
local Assets = game:GetDescendants()
local player = Players.LocalPlayer
local playerGui = player:WaitForChild("PlayerGui")
local UI = ReplicatedFirst.LoadingGui:Clone()

ReplicatedFirst:RemoveDefaultLoadingScreen()

repeat wait() until game:IsLoaded()
UI.Parent = playerGui
for i = 1, #Assets do
	local asset = Assets[i]
	ContentProvider:PreloadAsync({asset})
end

print("Done")
UI.Loading.Install.Text = "done"
UI.Loading.Wait.Text = "good_luck"
task.wait(1)
ReplicatedStorage.Remotes.PauseEvent:FireServer("Resume")
UI:Destroy()

It appears that you aren’t showing us the correct code

Sometimes these weird Roblox built-in script errors are just studio bugs.
Have you tried restarting studio?

the new roblox loading screen bugged out the code, which overall messed the code for some functions like RemoveDefaultLoadingScreen()

well yes i restart a few time but still getting that error

okay do you have any suggestion for me? should i remove that function or try anything else?

--!strict
--[[
	* Copyright (c) Roblox Corporation. All rights reserved.
	* Licensed under the MIT License (the "License");
	* you may not use this file except in compliance with the License.
	* You may obtain a copy of the License at
	*
	*     https://opensource.org/licenses/MIT
	*
	* Unless required by applicable law or agreed to in writing, software
	* distributed under the License is distributed on an "AS IS" BASIS,
	* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	* See the License for the specific language governing permissions and
	* limitations under the License.
]]
local Packages = script.Parent.Parent
local LuauPolyfill = require(Packages.LuauPolyfill)
local inspect = LuauPolyfill.util.inspect
local ReactRoblox = require(Packages.ReactRoblox)
type RootType = ReactRoblox.RootType

local warnOnce = require(script.Parent.warnOnce)

type RoactHandle = {
	root: RootType,
	key: string | number,
	parent: any, -- ROBLOX TODO: Instance?
}

local function mount(element: any, parent: any, key: string?): RoactHandle
	if _G.__DEV__ and _G.__COMPAT_WARNINGS__ then
		warnOnce("mount", "Please use the createRoot API in ReactRoblox")
	end

	if parent ~= nil and typeof(parent) ~= "Instance" then
		error(string.format(
			"Cannot mount element (`%s`) into a parent that is not a Roblox Instance (got type `%s`) \n%s",
			(function()
				if element then
					return tostring(element.type)
				end
				return "<unknown>"
			end)(),
			typeof(parent),
			(function()
				if parent ~= nil then
					return inspect(parent)
				end
				return ""
			end)()
		))
	end

	-- Since we use portals to actually parent to the provided parent argument,
	-- the container instance that we provide to createRoot is just a
	-- dummy instance.
	local root
	if _G.__ROACT_17_COMPAT_LEGACY_ROOT__ then
		root = ReactRoblox.createLegacyRoot(Instance.new("Folder"))
	else
		root = ReactRoblox.createRoot(Instance.new("Folder"))
	end
	if parent == nil then
		parent = Instance.new("Folder")
		parent.Name = "Target"
	end
	if key == nil then
		if _G.__ROACT_17_COMPAT_LEGACY_ROOT__ then
			key = "ReactLegacyRoot"
		else
			key = "ReactRoot"
		end
	end

	-- ROBLOX TODO: remove INLINE_ACT flag when all tests are updated to use
	-- `act` explicitly
	if _G.__ROACT_17_INLINE_ACT__ then
		ReactRoblox.act(function()
			root:render(ReactRoblox.createPortal({ [key] = element }, parent))
		end)
	else
		root:render(ReactRoblox.createPortal({ [key] = element }, parent))
	end

	return {
		root = root,
		-- To preserve the same key and portal to the same parent on update, we
		-- need to stash them in the opaque "tree" reference returned by `mount`
		parent = parent,
		key = key :: string,
	}
end

local function update(roactHandle: RoactHandle, element)
	if _G.__DEV__ and _G.__COMPAT_WARNINGS__ then
		warnOnce("update", "Please use the createRoot API in ReactRoblox")
	end

	local key = roactHandle.key
	local parent = roactHandle.parent
	-- ROBLOX TODO: remove INLINE_ACT flag when all tests are updated to use
	-- `act` explicitly
	if _G.__ROACT_17_INLINE_ACT__ then
		ReactRoblox.act(function()
			roactHandle.root:render(
				ReactRoblox.createPortal({ [key :: string] = element }, parent)
			)
		end)
	else
		roactHandle.root:render(
			ReactRoblox.createPortal({ [key :: string] = element }, parent)
		)
	end

	return roactHandle
end

local function unmount(roactHandle: RoactHandle)
	if _G.__DEV__ and _G.__COMPAT_WARNINGS__ then
		warnOnce("unmount", "Please use the createRoot API in ReactRoblox")
	end

	-- ROBLOX TODO: remove INLINE_ACT flag when all tests are updated to use
	-- `act` explicitly
	if _G.__ROACT_17_INLINE_ACT__ then
		ReactRoblox.act(function()
			roactHandle.root:unmount()
		end)
	else
		roactHandle.root:unmount()
	end
end

return {
	mount = mount,
	update = update,
	unmount = unmount,
}

okay here’s the roact tree code

This is the reason for that error.

1 Like

yea i also see these lines Stack Begin - Studio 23:07:17.316 Script 'CorePackages.Packages._Index.RoactCompat-a406e214-4230f473.RoactCompat.RoactTree', Line 130 - function unmount - Studio - RoactTree:130 23:07:17.316 Script 'LoadingScript', Line 1024 - function handleRemoveDefaultLoadingGui - Studio 23:07:17.316 Script 'LoadingScript', Line 1058 - function handleFinishedReplicating - Studio 23:07:17.317 Stack End - Studio

but anyway should i just remove that function or just gotta try anything else

Just simply remove this, thats really all i could say

2 Likes

i fixed it, simply just put the local script in the ReplicatedFirst. It now run well the loading screen know when to turn off when everything is loaded now. But after it load its still give me the error but its fine :smiley: