Why is my music (In StarterGui) not playing?

I am making a game that when you press a button a series of lanterns are released into the air followed by various effects.

Part of this is stopping the already playing music, and playing a new song. But when the button pressed (in-game) the music does not play and the lanterns are not released. Yet when in studio it works perfectly fine.

FE is NOT on.

Here is my code:

script.Parent.ClickDetector.MouseClick:connect(function()
	local la = game.Workspace.Lanterns
	local lag = la:GetChildren()
	for _,v in pairs(game.Players:GetChildren()) do
		v.PlayerGui.LIGHT:Play()
		v.PlayerGui.Nature:Stop()
		v.PlayerGui.Play.Disabled = true
		script.Parent.ClickDetector:Destroy()
		for _,v in pairs (lag) do
			spawn(function()
				if v.Name == "LanternAtt" then
					local attA = v:FindFirstChild("AttachmentA")
					if attA then
						local at = attA:FindFirstChild("Attachment")
						if at then
							wait(5)
							at:Destroy()
							wait(37)
							game.Workspace.Atmosphere.ParticleEmitter.Enabled = false
							wait(10)
							game.Lighting.SunRays.Intensity = 0.2
						end
					end
				end
			end)
		end
		wait(100)
		for _,v in pairs (lag) do
			v:Destroy()
		end
	end	
end)

Please help!

Looking at this script it would seem reasonable to separate the loop for players and the one for the lanterns.

script.Parent.ClickDetector.MouseClick:connect(function()
    local la = game.Workspace.Lanterns
    local lag = la:GetChildren()
    for _,v in pairs(game.Players:GetChildren()) do
        v.PlayerGui.LIGHT:Play()
        v.PlayerGui.Nature:Stop()
        v.PlayerGui.Play.Disabled = true
        script.Parent.ClickDetector:Destroy()
    end 
	 for _,v in pairs (lag) do
            spawn(function()
                if v.Name == "LanternAtt" then
                    local attA = v:FindFirstChild("AttachmentA")
                    if attA then
                        local at = attA:FindFirstChild("Attachment")
                        if at then
                            wait(5)
                            at:Destroy()
                            wait(37)
                            game.Workspace.Atmosphere.ParticleEmitter.Enabled = false
                            wait(10)
                            game.Lighting.SunRays.Intensity = 0.2
                        end
                    end
                end
            end)
        end
        wait(100)
        for _,v in pairs (lag) do
            v:Destroy()
        end
end)

Now it runs like this, for loop for the players, for loop for the lanterns, wait 100, then destroy