Why is "plrs" a unknown global error?????

-- Define variables

local ReplicatedStorage = game:GetService("ReplicatedStorage")

local ServerStorage = game:GetService("ServerStorage")

local MapFolder = ServerStorage:WaitForChild("Maps")

local Status = ReplicatedStorage:WaitForChild("Status")

local GameLength = 60

local reward = 100

-- Game loop

while true do

Status.Value = "Waiting for enough players"

repeat wait(1) until game.Players.NumPlayers >= 2

Status.Value = "Intermission"

wait(10)

local plrs = {}

for i, player in pairs(game.Players:GetPlayers()) do
    if player then 
        table.insert(plrs,player) -- Add each player into plrs table
    end
end

wait(2)

local AvailableMaps = MapFolder:GetChildren()

local ChosenMap = AvailableMaps[math.random(1,#AvailableMaps)]

Status.Value = ChosenMap.Name.." Chosen"

local ClonedMap = ChosenMap:Clone()
ClonedMap.Parent = workspace

-- Teleport players to the map

local SpawnPoints = ClonedMap:FindFirstChild("SpawnPoints")

if not SpawnPoints then 
    print("SpawnPoints not found!")
end

local AvailableSpawnPoints = SpawnPoints:GetChildren()

for i, player in pairs(plrs) do
    if player then
       character = player.Character

       if character then
          -- Teleport them 
         character:FindFirstChild("HumanoidRootPart").CFrame = AvailableSpawnPoints[1].CFrame
         table.remove(AvailableSpawnPoints,1)



         -- Give them a sword

        local Sword = ServerStorage.Sword:Clone()
        Sword.Parent = player.Backpack

        local Gametag = Instance.new("BoolValue")
        Gametag.Name ="Gametag"
        Gametag.Parent = player.Character

     else
          -- There is no character 
          if not player then
            table.remove(plrs,i)

          end
       end
   end
end

end

Status.Value = "Get ready to play!"

wait(2)

for i = GameLength,0,-1 do

for x, player in pairs(plrs) do
    if player then

        character = player.Character

        if not character then 
          -- Left the game
        else
            if character:FindFirstChild("Gametag") then 
                -- They are still alive
                print(player.Name.." is still in the game!")
            else
                -- They are dead
                table.remove(plrs,x)
            end
        end
    else
        table.remove(plrs,x)
        print(player.Name.."has been removed!")
    end
end

Status.Value = "There are "..i.." seconds remaining, and "..#plrs.."players left"

if #plrs == 1 then
    -- Last person standing
    Status.Value = "The winner is"..plrs[1].Name
    plrs[1].leaderstats.Bucks.Value = plrs[1].leaderstats.Bucks.Value + reward 
    break
elseif #plrs == 0 then
    Status.Value = "Nobody won!"
    break
elseif i == 0 then
    Status.Value = "Times up"
    break
end

wait(1)

end

print("End of game")

for i, player in pairs(game.Players:GetPlayers()) do character = player.Character

if not character then
    -- Ignore them
else
    if character:FindFirstChild("GameTag")then
        character.GameTag:Destroy()
    end

    if player.Backpack:FindFirstChild("Sword") then
        player.Backpack.Sword:Destroy()
    end
end

player:LoadCharacter()

end

ClonedMap:Destroy()

Status.Value = "Game has ended"

wait(2)