尝试使用 'LoadCharacter' 索引空值

在尝试使用 plr:LoadCharacter() 重生玩家时，它只会给我以下提示： 尝试使用 'LoadCharacter' 索引空值，我尝试了多种方式来做，比如Player:LoadCharacter()，或者有更有效的方法杀死/重生玩家吗？

--声明布尔全局变量
_G.TimerStart = false

--本地对象路径
local label = game.StarterGui.TimerGUI.Timer

--获取服务变量
local Teams = game:GetService("Teams")
local Players = game:GetService("Players")
local ReplicatedStorage = game:GetService("ReplicatedStorage")
local plr = game:GetService("Players").LocalPlayer

--获取子对象
local Child = game.Players:GetChildren()

--等待子对象变量
local TimeCountdown = ReplicatedStorage:WaitForChild("Timer")
local timerevent = ReplicatedStorage:WaitForChild("Timer")

local function Thieves(Players)
    if _G.TimerStart == false then
        for i,v in pairs(game.Teams.Thieves:GetPlayers()) do
            game.StarterGui.ThiefWinScreen.Frame.TextLabel.Script.Disabled = false
            wait(2)
            plr:LoadCharacter()
            wait(7)
            timerAmount = 120
        end
        for i,v in pairs(game.Teams.Police:GetPlayers()) do
            game.StarterGui.ThiefWinScreen.Frame.TextLabel.Script.Disabled = false
            wait(2)
            plr:LoadCharacter()
            wait(7)
            timerAmount = 120
        end
    end
end