Script is running twice in different locations?

I'm just gonna get straight to the point:

I have 1 script: and whenever it is called, or fired by the server, it's supposed to run once, BUT for some reason, it's running twice, from the script in the StarterGui and PlayerGui, and this is causing an error in the script running in the PlayerGui.

First script: Local script

local propertyfolder = workspace:WaitForChild("BloxopolyBoard"):WaitForChild("BloxopolyProperties")
local jailfolder = propertyfolder:WaitForChild("Jail"):WaitForChild("JustVisiting")
local playerspawns = workspace:WaitForChild("BloxopolyBoard"):WaitForChild("SpawnLocations")
local playernum = script.Parent.Parent.Parent.Parent.Parent:WaitForChild("Player")
local allproperties = {propertyfolder:WaitForChild("RobloxianAvenue"), propertyfolder:WaitForChild("CommunityChest1"), propertyfolder:WaitForChild("RobloxHQ"), propertyfolder:WaitForChild("IncomeTax"), propertyfolder:WaitForChild("ReadingRailroad"), propertyfolder:WaitForChild("SimulatorAvenue"), propertyfolder:WaitForChild("Chance1"), propertyfolder:WaitForChild("SimulatorStreet"), propertyfolder:WaitForChild("SimulatorHQ"), jailfolder:WaitForChild(playernum.Value), propertyfolder:WaitForChild("TycoonFactory"), propertyfolder:WaitForChild("ElectricCompany"), propertyfolder:WaitForChild("TycoonStreet"), propertyfolder:WaitForChild("TycoonAvenue"), propertyfolder:WaitForChild("PennsylvaniaRailroad"), propertyfolder:WaitForChild("Bloxy-ColaStreet"), propertyfolder:WaitForChild("CommunityChest2"), propertyfolder:WaitForChild("Ro-DonaldsLane"), propertyfolder:WaitForChild("Bloxy-ColaFactory"), propertyfolder:WaitForChild("FreeParking"), propertyfolder:WaitForChild("RobloxiaStreet"), propertyfolder:WaitForChild("Chance2"), propertyfolder:WaitForChild("RobloxCity"), propertyfolder:WaitForChild("TownOfRobloxia"), propertyfolder:WaitForChild("B&ORailroad"), propertyfolder:WaitForChild("Ro-PuterFactoryStreet"), propertyfolder:WaitForChild("Ro-PuterFactory"), propertyfolder:WaitForChild("WaterWorks"), propertyfolder:WaitForChild("Ro-PuterIndustry"), propertyfolder:WaitForChild("GoToJail"), propertyfolder:WaitForChild("SouthObbyStreet"), propertyfolder:WaitForChild("HardObbyLane"), propertyfolder:WaitForChild("CommunityChest3"), propertyfolder:WaitForChild("NorthwayObbyStreet"), propertyfolder:WaitForChild("Chance3"), propertyfolder:WaitForChild("BloxyThemePark"), propertyfolder:WaitForChild("LuxuryTax"), propertyfolder:WaitForChild("BloxyWalkWay"), playerspawns:WaitForChild(playernum.Value)}
local dice1 = script.Parent.Parent:WaitForChild("Dice1")
local dice2 = script.Parent.Parent:WaitForChild("Dice2")
local debounce = false
script.Parent.Parent:TweenPosition(UDim2.new(0.01, 0, 0.268, 0), "Out", "Back", 2)
script.Parent.MouseEnter:Connect(function()
    script.Parent.BackgroundColor3 = Color3.new(255,255,0)
end)
script.Parent.MouseLeave:Connect(function()
    script.Parent.BackgroundColor3 = Color3.new(255,255,255)
end)
wait(2)
script.Parent.MouseButton1Down:Connect(function()
    if not debounce then
        debounce = true
        local dice = {"rbxgameasset://Images/Dye (1)", "rbxgameasset://Images/Dye (2)", "rbxgameasset://Images/Dye (3)", "rbxgameasset://Images/Dye (4)", "rbxgameasset://Images/Dye (5)", "rbxgameasset://Images/Dye (6)"}
        local die1 = math.random(1,6)
        local die2 = math.random(1,6)
        local roll = die1 + die2
        dice1.Image = dice[die1]
        dice2.Image = dice[die2]
        local player = game.Players.LocalPlayer
        local spaces = player:WaitForChild("Spaces")
        spaces.Value = spaces.Value + roll
        if spaces.Value > 39 then
            spaces.Value = spaces.Value - 39
        end
        local playernum = player:FindFirstChild("Player")
        local char = player.Character
        local torso = char:FindFirstChild("Torso").Position
        local path = game:GetService("PathfindingService"):FindPathAsync(torso, allproperties[spaces.Value].Position)
        local moving = player:FindFirstChild("Moving")
        local points = path:GetWaypoints()
        local bg = script.Parent.Parent
        local intro = bg.Parent.Parent:WaitForChild("Intro")
        local repstorage = game:GetService("ReplicatedStorage")
        local remotefolder = repstorage:WaitForChild("Remotes")
        local rolls = remotefolder:WaitForChild("Rolls")
        rolls:FireServer(die1 + die2)
        wait(2)
        if path.Status == Enum.PathStatus.Success then
            moving.Value = true
            for i, v in pairs(points) do
                local humanoid = char:FindFirstChild("Humanoid")
                humanoid:MoveTo(v.Position)
                humanoid.MoveToFinished:wait()
            end
        end
        bg:TweenPosition(UDim2.new(-1,0,0.268,0), "In", "Back", 1.5)
        wait(1.5)
        moving.Value = false
        wait(1)
        local camera = remotefolder:WaitForChild("PropertyCam")
        camera:FireServer(spaces.Value, allproperties)
        wait(6)
        local propertyremote = remotefolder:WaitForChild("Properties")
        propertyremote:FireServer(spaces.Value)
        local turn = player:WaitForChild("Turn")
        if turn.Value == true then
            turn.Value = false
        end
        repeat wait() until turn.Value == false
        local turnvalue = remotefolder:WaitForChild("TurnValue")
        turnvalue:FireServer()
        script.Parent.Parent.Parent:Remove()
    end
end)

Script 2: server script

local repstorage = game:GetService("ReplicatedStorage")
local modules = repstorage:WaitForChild("Modules")
local turn = require(modules:WaitForChild("Turns"))
local playerscript = require(modules:WaitForChild("Players"))
local gamestarted = repstorage:WaitForChild("GameStarted")
local remotefolder = repstorage:WaitForChild("Remotes")
local rolls = remotefolder:WaitForChild("Rolls")
local turns = remotefolder:WaitForChild("Turns")
local guifolder = repstorage:WaitForChild("Gui's")
local turnvalue = remotefolder:WaitForChild("TurnValue")
local camera = remotefolder:WaitForChild("PropertyCam")
turns.OnServerEvent:Connect(function(player)
    table.insert(turn.turntable, player.Name)
    wait(1)
    for i, v in pairs(turn.turntable) do
        print(v)
    end 
    if #turn.turntable == 1 then
        print("Waiting for players...")
    else
        gamestarted.Value = true
    end
end)
repeat wait() until #turn.turntable == 1 or gamestarted.Value == true
repeat
    for i, v in ipairs(turn.turntable, turn.turntable[1], turn.turntable[#turn.turntable]) do
        local rolldice = guifolder:WaitForChild("RollDice")
        local player = game.Players:FindFirstChild(v)
        local playergui = player:WaitForChild("PlayerGui")
        local currentturn = player:WaitForChild("Turn")
        currentturn.Value = true
        rolldice:Clone().Parent = playergui
        camera.OnServerEvent:Connect(function(space, properties)
            for _, v in pairs(turn.turntable) do
                camera:FireClient(game.Players:FindFirstChild(v), space, properties)
            end
        end)
        local property = remotefolder:WaitForChild("Properties")
        property.OnServerEvent:Connect(function(spaces)
            for _, v in pairs(turn.turntable) do
                camera:FireClient(game.Players:FindFirstChild(v), spaces)
            end
        end)
        turnvalue.OnServerEvent:Connect(function()
            currentturn.Value = false
        end)
        repeat wait() until currentturn.Value == false
    end
until gamestarted.Value == false

Script 3: local script (the one thats causing the error)

local repstorage = game:GetService("ReplicatedStorage")
local remotefolder = repstorage:WaitForChild("Remotes")
local camera = remotefolder:WaitForChild("PropertyCam")
camera.OnClientEvent:Connect(function(plr, space, properties)
    local curcam = workspace.CurrentCamera
    local camerafolder = workspace:WaitForChild("Cameras")
    local tweenservice = game:GetService("TweenService")
    curcam.CameraType = "Scriptable"
    local tweenservice = game:GetService("TweenService")
    local tweeninfo = TweenInfo.new(5, Enum.EasingStyle.Quad, Enum.EasingDirection.Out, 0, false, 0)
    print(space)
    local camcoordinates = {CoordinateFrame = camerafolder:WaitForChild(space).CFrame}
    local cammove = tweenservice:Create(curcam, tweeninfo, camcoordinates)
    cammove:Play()
    print("Done")
end)

The weird thing about this is that it runs perfectly the first time, but whenever it tries to run the second time, it says: 19:06:40.077 - Argument 1 missing or nil 19:06:40.079 - Stack Begin 19:06:40.082 - Script 'Players.supercoolboy8804.PlayerGui.PropertyCam', Line 12 19:06:40.084 - Stack End As you can see, it runs the error in the PlayerGui, but not the one in the StarterGui.