I can't seem to get my face changing script to work, can somebody point out why this may be?

So basically I'm making a face changer UI, And the code linked worked fine. Until I tried to show my friend it in a game, Which then, he didn't see my changed face. So I thought the script being a local script was the problem, So i made it a regular script and now i get this

Players.andypop12345.PlayerGui.FaceChangeUi.FaceChange.AngrySadE.ImageButton.Script:5: attempt to index nil with 'Name'

Here's the script I attempted to use

local player = game.Players.LocalPlayer
local face = "http://www.roblox.com/asset/?id=5965483051"

script.Parent.MouseButton1Down:Connect(function() 
	game.Workspace[player.Name].Chest.FaceHere.Face.Texture = face
end)

Line 5 is the line that's giving the error And feel free to just give me the code if you want, but that's lazy me talking, I want to learn how to script better and stuff so try just point out why its not working instead of just giving me the solution.

I think what is happening is that the script is looking for the face when it has not loaded, Roblox avatar parts do not load instantly, they load when they decide to

local player = game.Players.LocalPlayer
local face = "http://www.roblox.com/asset/?id=5965483051"

script.Parent.MouseButton1Down:Connect(function() 
  local facepart =   game.Workspace:WaitForChild(player.Name):WaitForChild("Chest"):WaitForChild("Face")
facepart.AssetId = face
end)

hope this helped! if not please let me know