JSON mysteriously not working after it used to (no code was touched)

My ajax request is really simple and I have checked all the typos, and it DID work

But now, it simply just couldn’t retrieve the json data ~

I tried all json links and they all work fine. Could this be an error from Codepen?

p.s. After many trials the page just stop displaying - so I have to keep refreshing ~ any idea why?

You have an extra comma at the end of your JSON CALL error function. Also, the URL is returning status 404.
checked by console.(err.status)