When I go to the front-end of your site at
lesamarien.com, all of the links within the HTML all point to
www.lesamarien.com (with the www). There are also a lot of Javascript errors that are produced because the non-www version is calling a lot of content from the www version. This is not normal behavior of Joomla. The links should all use the same domain and subdomain, but on your site, something is forcing it to www.
I believe that's the issue, because all the Javascript errors are causing issues during the sending of requests as well. I did just try to send 2 requests. One from the non-www version and the other from the www version. Can you check if the image properly shows up for either one?
Hopefully, that's the problem. If so though, I don't know the solution, but I'm assuming you know what extension or code is converting all links from non-www to www.
Thanks,
Alex