Examples Inoperative?

[Wulfrun]

Before I spend many more hours can anyone tell me if I should expect these wiki tutorials to work with the current game?

Writing your first addon - no errors but no indication of combat when I attack something or get attacked.
MyFirstAddon tutorial by Zenimax Online - UI Erorr: function expected instead of nil in function '(main:chunk)'
Click Counter LUA Tutorial - counter never appears and slash commands don't do anything

These all show up in the addons list in game and can be enabled and disabled but are otherwise inoperative.
This makes me wonder if there is some basic and simple setting I don't have enabled.
I use Notepad++ and wonder if there are some invis chars messing things up.
ThankYou.