Why Won't My CoreGui's Re-Appear?

I used this code to disable all the CoreGUI's, disable the TopBar, and disable Reset.

local starterGui = game:GetService("StarterGui")

pcall(function()
	starterGui:SetCoreGuiEnabled(Enum.CoreGuiType.All, false)
	starterGui:SetCore("ResetButtonCallback",false)
	starterGui:SetCore("TopbarEnabled",false)
end)

and it works, but after my preloading system is done, I try to get the GUI's back and the reset button comes back enabled, but the GUI's don't come back up.

pcall(function()
	starterGui:SetCoreGuiEnabled(Enum.CoreGuiType.PlayerList, true)
	starterGui:SetCore("ResetButtonCallback",true)
end)

This is in a LocalScript in ReplicatedFirst

Full Code:

--// Game Setup
game:GetService("ReplicatedFirst"):RemoveDefaultLoadingScreen()
local cp = game:GetService("ContentProvider")

--// Player Setup
local Player = game:GetService("Players").LocalPlayer
local Character = Player.Character or Player.CharacterAdded:Wait()
local starterGui = game:GetService("StarterGui")

pcall(function()
	starterGui:SetCoreGuiEnabled(Enum.CoreGuiType.All, false)
	starterGui:SetCore("ResetButtonCallback",false)
	starterGui:SetCore("TopbarEnabled",false)
end)

--// Extra Setup
local ui = script:WaitForChild("LoadingGUI")
ui.Parent = game:GetService("Players").LocalPlayer:WaitForChild("PlayerGui")
local blur = Instance.new("BlurEffect", game:GetService("Workspace").CurrentCamera)
blur.Name = "Blur"

--// UI Variables
local BR = ui.Holder.BottomRight
local BL = ui.Holder.BottomLeft
local TR = ui.Holder.TopRight
local TL = ui.Holder.TopLeft
local BF = ui.Holder.BackgroundFrame
local LL = ui.Holder.LoadingLabel
local TT = ui.Holder.TimeTaken

--// Configuration
local optionalAssets = {}
local disabledServices = {
	-- Ex ["Lighting"] = false;
} -- Services Not To Preload

--// Preload
warn("Starting Preload")
local startTick = tick()

BR:TweenSize(UDim2.new(0.5,0,0.5,0),"Out","Linear",1,true)
BL:TweenSize(UDim2.new(0.5,0,0.5,0),"Out","Linear",1,true)
TR:TweenSize(UDim2.new(0.5,0,0.5,0),"Out","Linear",1,true)
TL:TweenSize(UDim2.new(0.5,0,0.5,0),"Out","Linear",1,true)
wait(1)
LL:TweenSize(UDim2.new(0.15,0,0.07,0),"Out","Linear",1,true)
BF:TweenSize(UDim2.new(0.15,0,0.07,0),"Out","Linear",1,true)
TT:TweenSize(UDim2.new(0.15,0,0.1,0),"Out","Linear",1,true)

--Preload Optional Assets First
cp:PreloadAsync(optionalAssets)

-- Preload The Entire Game
for i,service in pairs(game:GetChildren()) do
	pcall(function()
		if not disabledServices[service.Name] then
			cp:PreloadAsync({service})
		end
	end)
end

--// Ends Preload And Clears Everything (Fixing Everything)
warn("Preload Done, Time Taken: "..string.sub(tick()-startTick, 1, 5).."s")
LL.Text = "Loaded"
TT.Text = "Time Taken: "..string.sub(tick() - startTick, 1, 5).."s\nIf Time Exceeds 30s Please\nReport It To The Developers"
wait(2.5)
LL:TweenSize(UDim2.new(0,0,0.07,0),"Out","Linear",1,true)
BF:TweenSize(UDim2.new(0,0,0.07,0),"Out","Linear",1,true)
TT:TweenSize(UDim2.new(0,0,0.1,0),"Out","Linear",1,true)
wait(1)
BR:TweenSize(UDim2.new(0,0,0,0),"Out","Linear",1,true)
BL:TweenSize(UDim2.new(0,0,0,0),"Out","Linear",1,true)
TR:TweenSize(UDim2.new(0,0,0,0),"Out","Linear",1,true)
TL:TweenSize(UDim2.new(0,0,0,0),"Out","Linear",1,true)
wait(1)
for i = 24,0,-1 do
	blur.Size = i
	wait()
end
wait()
pcall(function()
	starterGui:SetCoreGuiEnabled(Enum.CoreGuiType.PlayerList, true)
	starterGui:SetCore("ResetButtonCallback",true)
end)
wait(1)
ui:Destroy()

Any help?