Help with making this script succesfuly get Players from Players?

Hello, I have a question about this script. It is supposed to get every player from the "Players" thing, but it keeps not working. Here's the error:

18:03:25.623 - Workspace.WinnerServer:9: bad argument #2 to 'random' (interval is empty)
18:03:25.624 - Stack Begin
18:03:25.625 - Script 'Workspace.WinnerServer', Line 9 - global Tree
18:03:25.625 - Script 'Workspace.WinnerServer', Line 22
18:03:25.626 - Stack End

Here is my ServerScript:

math.randomseed(os.time());
local list = {};
function Tree()
for index, child in pairs(game.Players:GetChildren()) do
        wait();
        list[index] = child;
local Players = game:GetService("Players")
end
local Player = list[math.random(1,table.getn(list))]
local ReplicatedStorage = game:GetService("ReplicatedStorage")
local WinEvent = ReplicatedStorage.WinEvent
local WinAllEvent = ReplicatedStorage.WinEvent
local Character = Player.Character or Player.CharacterAdded:wait()
Character.HumaniodRootPart.CFrame = CFrame.new(Vector3.new(1486.811, 12.995, -1925.389))
Player.leaderstats.Wins.Value = Player.leaderstats.Wins.Value + 1
WinEvent:FireClient(Player)
local Namez = Player.Name
WinAllEvent:FireAllClients(Player.Name)
end

while true do
wait(20)
Tree();
end