Interval is empty. Nobody can find the solution. Help?

Got help from very helpful dudes, and this is what left that they could not figure out:

The error that is getting spit out is - 8: bad argument #1 to 'random' (interval is empty)

TeamName = "Monster"
players = game.Players:GetPlayers()
selected = ""

function SelectPlayer()
    if #players ~= 1 then
		print(#players)
        local num = math.random(game.Players.NumPlayers)
        selected = players[num]
    else selected = players[1] end
end

SelectPlayer()

function TeamPlayer(player)
    local play = game.Players:FindFirstChild(player.Name)
    local team = game.Teams:FindFirstChild(TeamName)

    if play~= nil then
        play.TeamColor = team.TeamColor
    end
end

TeamPlayer(selected)

Please don't say "Nobody can find the solution" when 2 people told you the solution on your previous post

Your script obviously will not work without a player, I setup a minimum amount because it's not useful at all to pick a "random player" with only one player in the game

local minimum = 3 -- The minimum amount of players needed to start a game
local playerServ = game:GetService("Players")
while #playerServ:GetPlayers() < minimum do wait(0.5) end

local function SelectPlayer()
	local players = playerServ:GetPlayers()
	if #players < minimum then return end
	local random = players[Random.new():NextInteger(1, #players)]
	random.Team = game.Teams.someTeam
end

SelectPlayer()

function SelectPlayer()
    if #players ~= 1 then
        print(#players)
	math.randomseed(math.random(tick()))
        local num = math.random(1, #game.Players:GetPlayers())
        selected = players[num]
    else selected = players[1] end
end