It seems like I can't access any Lists on https sites, I get the status -> error everytime I try. Tried GetList and GetListItems operations in my Javascript function, which works fine on any site I tested it - as I just have to change my "SITE_URL" parameter. The webURL and listName are given.
So I came to ask: Is SPServices working different on https?
EDIT: Someone coming across this question looking for similar issues may find this topic about CORS, different farms and HTTP / HTTPS useful: Link