404 error when deploying chatbot (IBM course)

Hi, I seem to be having a similar issue to that which others’ have reported. I am attempting to deploy my Watson Assistant to the sample wordpress site but I am getting a 404 error after applying the URL & API Key:

    "trace": "6df8e5f2-814f-45bc-b9e5-3e828bfe33e3",
    "code": 404,
    "error": "Not Found"

I have published in IBM Cloud so I’m unclear what else to check; any assistance would be much appreciated..

Thanks in advance!

The page I need help with: [log in to see the link]