TypeError: editor is null

Upon unpacking the zipped folder and opening the blankgame file in firefox I came to the “My First ChoiceScript Game” title and below that it said loading, and suddenly the screen greyed and I was given the error message above “TypeError: editor is null”. When I searched around looking up problems similar to mine, someone suggested something was wrong with JavaScript and it seems to be enabled. Does anyone have any suggestions on how I can fix this?

Thank you for giving me your time!

Are you running CS locally or using the web-based IDE (where that error would make a lot more sense)?
As far as I can figure there shouldn’t be anything relating to an editor in the standard game.

Sorry, CJW, I’m very computer-savvy so I’m not quite sure what you mean by locally or web-based IDE.

But I’m not using any extra programs as far as I know, if that’s what you are referring to. I’ve used only what the tutorial advised me to. Firefox and notepad.