Why isnt my custom character Data Store working?

It prints Cannot Store Array In Data Store on line 23..This is one of my first times using Data Stores so I'm a little confused as to what to do.. please help

local DataStore = game:GetService("DataStoreService"):GetDataStore("CustomStore")

game.Players.PlayerAdded:connect(function(Player)
	
	local HairValue = Player.PlayerGui:WaitForChild("ScreenGui").CustomControls.ControlScript:WaitForChild("HairValue").Value
	local HairColorValue = Player.PlayerGui:WaitForChild("ScreenGui").CustomControls.ControlScript:WaitForChild("HairColorValue").Value
	local PantsValue = Player.PlayerGui:WaitForChild("ScreenGui").CustomControls.ControlScript:WaitForChild("PantsValue").Value
	local ShirtValue = Player.PlayerGui:WaitForChild("ScreenGui").CustomControls.ControlScript:WaitForChild("ShirtValue").Value
	
	local Key = "Player-" .. Player.userId
	
	local SavedValues = DataStore:GetAsync(Key)
	
	if SavedValues then
		
		HairValue = SavedValues[1]
		HairColorValue = SavedValues[2]
		PantsValue = SavedValues[3]
		ShirtValue = SavedValues[4]
	else
		
		local ValuesToSave = {HairValue, HairColorValue, PantsValue, ShirtValue}
		SavedValues = DataStore:SetAsync(Key, ValuesToSave)
	end
end)

Not quite sure how I'd comment on your post...

local DataStore = game:GetService("DataStoreService"):GetDataStore("CustomStore")

game.Players.PlayerAdded:connect(function(Player)
	local CS  = Player.PlayerGui:WaitForChild('ScreenGui').CustomControls.ControlScript
	
	local stats = {
		CS:WaitForChild('HairValue').Value,
		CS:WaitForChild('HairColor').Value,
		CS:WaitForChild('PantsValue').Value,
		CS:WaitForChild('ShirtValue').Value
	}
    local Key = "Player-" .. Player.UserId -- This was really all I changed since userId is deprecated.

    local SavedValues = DataStore:GetAsync(Key)

    if SavedValues then
		SavedValues = stats
    else

        local ValuesToSave = stats
        SavedValues = DataStore:SetAsync(Key, ValuesToSave)
    end
end)