You look to have 2 accounts on our site. The one you're posting from "tarbar" and another one which you actually subscribed to JFBConnect from, "tarik". If you'd like, we can switch your subscription to this account to make things easier. Otherwise, it's much easier if you post from your other account. Just let us know what you'd prefer.
As to the error, when you disable SSL, it works properly, correct? Knowing that helps narrow things down.
I've done a lot of investigation and the most common cause of the problem you mention above is that there is a permissions issue with some file on your site. Have you edited any files through FTP on your site? If so, the permissions may have changed when you saved it. You'll need to check your files to determine if the files or directories are are setup properly.
If you have SSH access to your site, you can run the following commands from the root directory of your Joomla site to fix permissions on all the files and directories:
find /path/to/joomla/root/ -type d -exec chmod 755 {} ;
find /path/to/joomla/root/ -type f -exec chmod 644 {} ;
Other suggestions are:
* Set the Error Reporting setting in the Joomla Global Configuration area to "Maximum" and try again.
* Check your server error logs (you may need to contact your host to get them) to determine what errors are being logged.
I hope that helps get you started,
Alex