ServerScriptService.mini game script:18: attempt to index nil with 'GetChildren'?

I changed line 18 from local players = game.Players to local players = Region3.Players and now im getting a ServerScriptService.mini game script:18: attempt to index nil with 'GetChildren' error

local status = game.ReplicatedStorage.status
local maps = game.ReplicatedStorage.maps:GetChildren()
while true do
	for i = 1,3
	do
		status.Value = "Intermisson:"..3-i
		wait(1)
	end
	
	local rand = math.random(1, #maps)
	
	local map = maps [rand]:Clone()
	map.Parent = workspace
	
	status.Value = "we'll be playing "..map.Name
	wait(3)
	
	local players = Region3.Players:GetChildren()
	for i = 1,#players do
		if players[i].Character ~= nil then
			local spawnlocation = math.random(1,#workspace.Teleports:GetChildren())
			players[i].Character:MoveTo(workspace.Teleports:GetChildren()[spawnlocation].Position)
			players[i].Character.Parent = workspace.ingame
		end
	end
	
	local roundlength = 50

	local canwin = true
	
	if map:FindFirstChild("obby") then
		map.endpart.Touched:Connect(function(hit)
			if hit.Parent:FindFirstChild("Humanoid")then
				canwin = true
				status.value = hit.Parent.name.."he's won"
			end
		end)
	end
	
	repeat
		roundlength = roundlength -1
		status.Value =  "time left:"..roundlength
		wait(1)
	until roundlength == 0 or canwin == false or #workspace.ingame:GetChildren()==0
	
	wait(1)
	map: destroy()
	
	local players = game.Players:GetChildren()
	for i = 1, #players do
		if players[i].Character ~= nil then
			players[i]:LoadCharacter()
		end
		end
	end

There are no Region3's defined in this code, and either way, "Players" is not a valid property of a Region3. It looks like you're just teleporting people, so you can just use

local players = game.Players:GetPlayers()

as a sidenote, instead of doing this to loop through a table:

local table = {"a", "b", "c"}
for i = 1, #table do
	print(table[i])
end

you can do this:

local table = {"a", "b", "c"}
for i, value in pairs(table) do
	print(value)
end