Remote events work in studio but not in player?

game.ReplicatedStorage.build.OnServerEvent:connect(function(player,color,
building,translation)
	--repeat wait() until building
	local buil = building:Clone()--clone cause reason
	for i,v in pairs(buil:GetChildren()) do
		if v.Name == "Recolor" then--recolor
			v.BrickColor = BrickColor.new(color.Color)--color is the players teamcolor
		end
	end
	spawn(function()_G.build(buil,25,30)end)--a function that works
	buil:TranslateBy(translation)--translate, cause yea
	wait()--because reasons
	buil.Parent = game.Workspace
end)

It works fine in studio, but in player, it says in the console something about building being nil. When I uncomment line 3, it never goes. I assume it stops there forever. building is a model btw, and I really don't know why this isn't working. I fire it from this:

game.ReplicatedStorage.build:FireServer(color,sendB,toTranslate)--sendB is the model

I think it might be because you try to send an object over RemoteEvent. If the object isn't available both on server and client(for example, client creates an instance with filtering enabled or client creates object which is not parented if filtering is off). Remote event only sends a reference to the object, not the whole thing.