invalid argument #2 to 'random' (interval is empty)?

The Code is:

while true do

    local players = game.Players:GetChildren()



    local giant = players[math.random(1, #players)]

    wait()

    for i = 1,20 do

        local player = game.Players:GetChildren()
        status.Value = "Intermision "..20-i
        wait(1)
    end

    for i = 1,#players do
        if players[i].Character ~= nil then
            local spawnLocation = math.random(1,#workspace.Teleports:GetChildren())
            local giantspawnLocation = math.random(1,#workspace.GiantTeleport:GetChildren())
            players[i].Character:MoveTo(workspace.Teleports:GetChildren()[spawnLocation].Position)
            giant.Character:MoveTo(workspace.GiantTeleport:GetChildren()[giantspawnLocation].Position)
            PlayerSize(giant)

        end
    end
    for s = 1,20 do
        status.Value = "Game "..20-s
        wait(1)
        for l = 1,#players do

            giant.Character.HumanoidRootPart.Touched:Connect(function(player)
                local humanoid = players[l].Character.Humanoid
                if humanoid.Parent.Name ~= giant.Name then
                    humanoid:TakeDamage(100)
                end
            end)
        end
    end

    print(giant)

    wait(1)
    for p = 1,#players do


        giant.Character.Humanoid:TakeDamage(1000)
        players[p].Character.Humanoid.Health = 0
    end

end