One script says array[2] exists, other says it's nil?

So I've been trying to get this to work for hours and it just won't. I'm trying to send whatever player is in queue[2] to another place, but it says it's nil, meanwhile the localscript has no problem seeing the player's id in queue[2]. I'm so confused.

Important things in Modulescript:

local queue = {} --Line 3
table.insert(queue,1,0) --Line 4

function module_MM.add(playerId) --line 8
    table.insert(queue, playerId) --line 9
end --line 10

game:GetService('TeleportService'):Teleport(newPlaceId, queue[2]) --line 28

function module_MM.firstPlayer() --line 44
    return queue[2] --line 45
end --line 46

Important things in localscript:

player = game.Players.LocalPlayer --line 1
local Matchmaking = require(workspace.MatchMaking) --line 2

Matchmaking.add(player.UserId) --line 15

Important things in script that sends players away:

local Matchmaking = require(workspace.MatchMaking) --line 1

--the following inside a while true do loop
player = Matchmaking.firstPlayer() --line 6

local getId = game:GetService("Players"):GetPlayerByUserId(player) --line 24
if game.Players:FindFirstChild(tostring(getId)) ~= nil then --line 23
    Matchmaking.teleport() --line 22
end --line 21

Edit: Works in studio (Though it obviously can't create a place there)