Game pass script not functioning?

I'm assuming the error is on line 12. The PlayerHasPass method has been deprecated not too long ago, so you'll need to update it using MarketplaceService's UserOwnsGamePassAsync.

function assign(property, player)
    local GUI = game.ReplicatedStorage:FindFirstChild("Gamepass"..property):GetChildren()
    for i = 1,#GUI do
        GUI[i]:Clone().Parent = player.PlayerGui.ScreenGui.Avatar:FindFirstChild(property)
    end
end


game.Players.PlayerAdded:Connect(function(player)
    player.CharacterAdded:Connect(function(character)
        wait(0.1)
        if game:GetService("MarketplaceService"):UserOwnsGamePassAsync(player.UserId, 4950898) then -- Instead of giving the player's instance in the first argument, we pass the player's user id.
            assign("Colors",player)
            assign("Faces",player)
        end
    end)
end)

Sources: https://wiki.roblox.com/index.php?title=API:Class/MarketplaceService/UserOwnsGamePassAsync

If you have any problems with this script, let me know in the comments. If it works and you're satisfied, be sure to accept the answer!