Need help with Face Changing GUI, issues with client replication\Remote event?

Last month I asked for help with a Face Changing GUI, since I kept getting this error: "attempt to index nil with 'Character' error". Someone was kind enough to explain what the issue was and even provided a working version of my code, which is the following:

local char = game.Players.LocalPlayer.Character
local f = script.Parent.MakeUps:GetChildren()   
local head = char:WaitForChild("Head")

for _,v in pairs(f) do
  if v:IsA("ImageButton") then
      v.MouseButton1Click:Connect(function()
          head.face.Texture = v.Image
      end)
  end
end

While this code does exactly what I wanted it to do (changing my avatar's face with the one selected from the GUI), the result doesn't reproduce on other people's client. Instead, it just looks like you have no face. I figured out that I need to use Remote Events to "bypass" FE and allow other players to see the change too, which is what I did, but sadly it doesn't seem to work, probably due to my lack of experience with Remote Events.

This is the result of my attempt at using Remove Events:

In StarterCharacterScripts, LocalScipt

local RS = game:GetService("ReplicatedStorage")
local GUISer = game:GetService("StarterGui")
local frame = GUISer.MugChanger.MK.Frame

local char = game.Players.LocalPlayer.Character
local head = char:WaitForChild("Head")

local RemoteEvent = RS:WaitForChild("MakeUpChange")
local MakeUps,MakeUps =  frame.NarrowHead.MakeUps:GetChildren(),  frame.WomanHead.MakeUps:GetChildren()


for _,v in pairs(MakeUps) do
    if v:IsA("ImageButton") then
        v.MouseButton1Click:Connect(function()
            RemoteEvent:FireServer(head)
        end)
    end
end

In ServerScriptService, Script

local RS = game:GetService("ReplicatedStorage")
local RemoteEvent = RS:WaitForChild("MakeUpChange")

RemoteEvent.OnServerEvent:Connect(function(player,v,head)
        head.face.Texture = v.Image
    end)

I assume it's something related to the arguments used in the functions, which is the part I least understand at the moment, but I'm not sure. Is someone able to help me fixing the code?

EDIT: no errors reported in the console.