Codepen JSON not working

I can’t figure out why a ridiculously straightforward JSON test isn’t working, considering I’ve bought Codepen PRO for the most part for JSON functionality. In my Chrome console I get the standard CORS errors too.

Note: I’m sticking to vanilla JS as I’m still working hard to get the fundamentals of the language nailed down.

@randykomforty The JSON file you are trying to load is not valid JSON.

Line 11 should look like:

"ten": "<ul><li>\"do/will do\"</li><li>\"there is/there will be\"</li></ul>",

and line 18 should look like:

"seventeen": ""

Thank you, much appreciated!