bad argument 2# to random,(interval is empty)?

it seems like the 30 line has an math random error, but i don't see anything wrong with it . i don't know what the output is trying to tell me, but here is the script i made:

players = {}
local chosenplayer1 = nil
local chosenplayer2 = nil
local stringvalue = game.Workspace.Baseplate.event.Value
local serverstore = game:GetService("ServerStorage")
events = {"test"}
local chosenevent = nil


local function onCharacterAdded(chr)
	table.insert(players, chr)
end

local index = -1

local function OnCharacterRemoved(removed)
	for i, v in pairs(players) do
		if removed == v then
			index = i
		end
	end
	table.remove(players, index)
end

local function ChooseEvent()
	local chooseevent = events[math.random(1,#events)]
	chosenevent = chooseevent
	print(chosenevent)
	if chosenevent == "test" then
		local value = players[math.random(1,#players)]
		  stringvalue = value
			local char = game.Workspace:FindFirstChild(stringvalue)
				print(char)
	end
end


game.Players.PlayerAdded:Connect(onCharacterAdded)
game.Players.PlayerRemoving:Connect(OnCharacterRemoved)
ChooseEvent()