Players not moving to map?

Hello, I'm am EXTREMELY new to Lua, so go easy on me please, I'm trying to move the HumanoidRootPart of the players to the spawnpoints that are located on the chosen map, but when starting up a server with the minimum amount of players it displays this error, " 23:15:32.804 - ServerScriptService.MainScript:53: attempt to index local 'SpawnPoints' (a nil value)" I have no idea what this means so I would appreciate any help, I'm trying my best!

-- Define variables

local ReplicatedStorage = game:GetService("ReplicatedStorage")

local ServerStorage = game:GetService("ServerStorage")

local MapsFolder = ServerStorage:WaitForChild("Maps")

local Status = ReplicatedStorage:WaitForChild("Status")

local GameLength = 50

local reward = 100

-- Game loop

while true do

Status.Value = "Waiting For Players"

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

Status.Value = "Intermission"

wait(10)

local plrs = {}

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

end

wait(2)

local AvailableMaps = MapsFolder: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!")
	
	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
	
	
	Status.Value = "Match Beginning!"
	
	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.BattleCoins.Value = plrs[1].leaderstats.BattleCoins.Value + reward
			break
		elseif #plrs == 0 then
			Status.Value = "Nobody won!"
			break
		elseif i == 0 then
			Status.Value = "Time up!"
		end
		
		wait(1)
	end
	
	print("End of match!")
	
	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
			
			if character:FindFirstChild("Sword") then
				character.Sword:Destroy()
			end
			
		end
		
		player:LoadCharacter()
	end
	
	ClonedMap:Destroy()
	
	Status.Value = "Match Complete"
	
	wait(2)
end
end
end