(Module Script) Not working? [Edited]

For your module code, you'll want to keep the module's global at the top or create a new one. Then convert your module's function to a global function using the modulescript's global that we create. At then you'll want to return the global instead of the function.

local module = {}

function module.MorphPlayer(char, morph)
    local settings = require(script.Settings)
    local m = morph:Clone()
    m.Parent = char
    for i, v in pairs(m:GetChildren()) do
        if v:FindFirstChild("MainPart") then
            for i, p in pairs(v:GetChildren()) do
                if p.Name ~= "MainPart" then
                    local w = Instance.new("Weld", p)
                    w.Part0 = v.MainPart
                    w.Part1 = p
                    w.C1 = p.CFrame:inverse() * v.MainPart.CFrame
                    Instance.new("BodyForce", p).force = Vector3.new(0, p:GetMass() * 196.2, 0)
                    p.Anchored = false
                else
                    if p:FindFirstChild("face") then
                        p.face:Destroy()
                    end
                    p.Anchored = false
                    p.Transparency = 1
                    p.CanCollide = false
                    local w = Instance.new("Weld", p)
                    w.Part0 = char[v.Name]
                    w.Part1 = p
                end
            end
        end
        if settings.RemoveHats then
            if v:IsA("Hat") then
                v:Destroy()
            end
        end
        if settings.RemoveCharacterMeshes then
            if v:IsA("CharacterMesh") then
                v:Destroy()
            end
        end
        if settings.RemoveClothes then
            if v:IsA("Shirt") or v:IsA("Pants") then
                v:Destroy()
            end
        end
    end
end

return module

After this, we go back to your script that calls it. You'll want to require the modulescript as you already do, then call it using the same identifier. You'll need to include the function with it that you are calling from the modulescript.

local Morph = require(game.ReplicatedStorage.MorphModule)

    game.Players.PlayerAdded:connect(function(player)
        player.CharacterAdded:connect(function(character)
            Morph.MorphPlayer(character, game.ReplicatedStorage.Morph)
        end)
    end)