how to fix? Cannot store Array in data store. Data stores can only accept valid UTF-8 characters.

local ds = game:GetService("DataStoreService"):GetDataStore("SaveData")
game.Players.PlayerAdded:Connect(function(plr)
	wait()
	local plrkey = "id_"..plr.userId
	local save1 = plr.leaderstats.Clicks
	local save2 = plr.leaderstats.Rebirths
	local save3 = plr.leaderstats.Gems

	local GetSaved = ds:GetAsync(plrkey)
	if GetSaved then
		save1.Value = GetSaved[1]
		save2.Value = GetSaved[2]
		save3.Value = GetSaved[3]
	else
		local NumberForSaving = {save1.Value,save2.Value,save3.Value}
		ds:GetAsync(plrkey,NumberForSaving)
	end
end)

game.Players.PlayerRemoving:Connect(function(plr)
	ds:SetAsync("id_"..plr.userId,{plr.leaderstats.Rebirths.Value,plr.leaderstats.Clicks,plr.leaderstats.Gems.Value})
end)

[Edit by JesseSong:]

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Thanks, JesseSong!