Does the selection highlight as green, like in my screenshot above?

What browser are you using? Have you made sure it's up to date?

Have you tried a different browser yet? If not, can you just to see if it's browser related?


At this point, it sounds like your browser is not liking something in the scripting itself. This could potentially be because your browser is out dated and the script is doing something that's relatively new and your browser doesn't understand it.