Server wont recognise value from client?

Help and Feedback Scripting Support
#1

In these two scripts, the client looks at a folder in replicated storage called “OwnedCars” which is filled with the players owned cars which are cloned to the folder by another local script.

The client then creates a button for each owned car with a specific ObjectValue child connected to the cars, if the player clicks the button it will send the ObjectValue over to the server to be cloned. However, the server seems to not acknowledge its existence.

Client:

local GUI = script.Parent

local garageFrame = GUI.UIFrame.GarageFrame
local openAndCloseButton = GUI.OpenAndCloseButton

local cars = game.ReplicatedStorage.OwnedCars
local spawnUIButton = game.ReplicatedStorage.UI.SpawnButton

local spawnCarEvent = game.ReplicatedStorage.Events.SpawnCar

local function updateCars()
	
	for _, child in pairs(garageFrame:GetChildren()) do
		if child:IsA("GuiObject") and child.Name == spawnUIButton.Name then
			child:Destroy()
		end
	end
	
	for i, v in pairs(cars:GetChildren()) do
		local clonedSpawnButton = spawnUIButton:Clone()
		clonedSpawnButton.Parent = garageFrame
		clonedSpawnButton:FindFirstChild("Car").Value = v
		clonedSpawnButton.Text = "Spawn " .. clonedSpawnButton:FindFirstChild("Car").Value.Name
		
		clonedSpawnButton.MouseButton1Down:Connect(function ()
			print(clonedSpawnButton.Car.Value)
			spawnCarEvent:FireServer(clonedSpawnButton.Car.Value, cars)
		end)
	end
end



openAndCloseButton.MouseButton1Down:Connect(function ()
	updateCars()
	GUI.UIFrame.Visible = not GUI.UIFrame.Visible
end)

prints the objectvalue with no problem at all

Server:

local spawnCarEvent = game.ReplicatedStorage.Events.SpawnCar

local function spawnCar(player, carValue, cars)
	
	--for i, v in pairs(cars) do
	--	if v:GetAttribute("PlayerId") == player.UserId then
	--		v:Destroy()
	--	end
	--end

	print(carValue)
	local car = carValue

	local clonedCar = car:Clone()
	print("cloned car : " .. clonedCar.Name)
	clonedCar:SetAttribute("PlayerId", player.UserId)
	
	if clonedCar:GetAttribute("Colorable") == true then
		clonedCar:FindFirstChild("Body").BrickColor = BrickColor.random()
	end
	
	clonedCar.Parent = workspace.Cars
	
	clonedCar:MoveTo(player.Character.HumanoidRootPart.Position + player.Character.HumanoidRootPart.CFrame.LookVector + Vector3.new(5, 0,0))

end

spawnCarEvent.OnServerEvent:Connect(function (plr, carValue, carsFolder)
	spawnCar(plr, carValue, carsFolder)
end)

If you want to know anymore information, im here to reply as im desperate to stop this problem.

#2

The replication boundary is a core component in the security of the client-server model. It prevents clients from greatly influencing the state of other clients. Most actions that the client performs will not be replicated to the server, especially not the creation of instances