Gui Checking for Datastore Value onPlayerEntered error?

I am making a Gui that checks for a BoolValue using DataStoreService when a player joins the game.

How this works is, when a player clicks on a TextButton, a TextLabel will become visible and so does a GuiValue inside a folder in the player. When the player leaves the game, the GuiValue saves and remains true. When the player joins back, the GuiValue should still remain true for that player and the TextLabel checks if the GuiValue is true so then the TextLabel should remain visible.

Now here's the problem, when the player joins back into the game, the GuiValue remains True, but the TextLabel's Visibility remains False.

The only error i could find is: " Infinite yield possible on 'Players.Player1.PlayerGui:WaitForChild("SaveScreenGui")' " 'ServerScriptService.GuiDataStore', Line 11 - global loadGuiValue 'ServerScriptService.GuiDataStore', Line 24

Datastore Script in ServerScriptService:

local DSS = game:GetService("DataStoreService"):GetDataStore("GuiStore1")
local event = game.ReplicatedStorage.PlayerGuiEvent

function saveGuiValue(player)
    DSS:SetAsync(player.userId, player.GuiFolder.GuiValue.Value)
    print("Saved Gui Value")
end

function loadGuiValue(player)
    player.GuiFolder.GuiValue.Value = DSS:GetAsync(player.userId)
    local Gui = player:WaitForChild("PlayerGui"):WaitForChild("SaveScreenGui").TextLabel
    event:FireClient(player, Gui)
end

function onPlayerEntered(newPlayer)
    local GuiFolder = Instance.new("Folder", newPlayer)
    GuiFolder.Name = "GuiFolder"

    local guiValue = Instance.new("BoolValue", GuiFolder)
    guiValue.Name = "GuiValue"
    guiValue.Value = false

    newPlayer:WaitForDataReady()
    loadGuiValue(newPlayer)

end

function onPlayerRemoving(player)
    local guiValue = player.GuiFolder:FindFirstChild("GuiValue")

    if (guiValue ~= nil) then
        saveGuiValue(player)
    end
end

game.Players.PlayerAdded:Connect(onPlayerEntered)
game.Players.PlayerRemoving:Connect(onPlayerRemoving)

LocalScript inside the button with MouseButton1Click and checks for GuiValue:

local plr = game.Players.LocalPlayer
local event = game.ReplicatedStorage.PlayerGuiEvent

event.OnClientEvent:Connect(function(plr,Gui)
    if plr.GuiFolder.GuiValue.Value == true then
        Gui.Visible = true
    else
        Gui.Visible = false
    end
end)

script.Parent.MouseButton1Click:Connect(function()
    local guiValue = plr:WaitForChild("GuiFolder"):FindFirstChild("GuiValue")
    local TextLabel = plr:WaitForChild("PlayerGui").SaveScreenGui.TextLabel
    guiValue.Value = true
    TextLabel.Visible = true
end)