conf.graphWidth is not a function error on loading the JSON data file

Hi,

On Firefox, I have conf.graphWidth is not a function in debugger. Just out of guess, I think the first call to the function with conf failed because the JSON file could not be load.
I really don't know why, I ported the package to Github pages so that all resources reside under a secure domain to avoid other domain security errors like CORS...

Check the example here: https://bacloud14.github.io/graph/

At the same time, I am asking is there another way to load available data in a current run-time without loading it from a JSON file?.

I have no starting point on how to point more specifically the error, so please forgive that. I am not an advanced web programmer.

many thanks !