We (and countless others) have been referencing this plotly-basic.js in JSfiddle.
https://d14fo0winaifog.cloudfront.net/plotly-basic.js
This is now returning
AccessDenied
Access Denied
D2B336D56611C08F
th7kXrlzp9DBKAGFt/cfG931hka25lJfEIkrNWl7FK9HVVSMgDhukAyFwfsnmMj3qUtVeWoNyUo=
eg:
https://codepen.io/plotly/pen/ZGPEqR.html
https://jsfiddle.net/Shitsu/uax3eju6/
etc
Are you able to send me a copy of this JS file or provide a new URL?
Or let me know which version is compatible with:
https://cdnjs.cloudflare.com/ajax/libs/d3/3.5.6/d3.min.js
https://code.jquery.com/jquery-2.1.4.min.js