"You are accessing from an HTTPS connection and our service is located in an HTTP server."
What?
The website uses a service located in other domain (servlet deployed in a HTTP server). To deal with CORS, it is better to access the website through HTTP.
We are trying to fix this...
In short, this is the sad life of researchers in Software Engineering. You would think we have all kinds of facilities to setup our own servers and the like. Well, we don't :-( (and I better stop here)