Exporting Variables into a Google Spreadsheet

I have used Google spreadsheets several times in the past to store Storyline variables. I know what the process is and I never had any problems until now. With a new spreadsheet and new Storyline project I now get an error when I run the published content. In the browser console, I get :

"Failed to load https://script.google.com/macros/u/0/s/../exec: No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://...com' is therefore not allowed access. The response had HTTP status code 404."

Note: I replaced the real URL with ..

After some research this seems to be a cross domain security issue (the SL content runs on one domain, while the Google spreadsheet is hosted on another). BTW, this also happens with Captivate-based content, so my guess is the issue is related to the "the Google end".

Does anyone have insights on the root cause and how to fix this issue?