Hallelujah, I managed to get everything working perfect. Shame on me
The main problem came from a bad definition of the internal address (Network configuration section), in particular the "complementary" part of the address (/jeedom) which was not to be defined for me (check your URL Jeedom access to be sure).
So I have : http://jeedom:80 where "jeedom" is 127.0.1.1 (as to be defined in /etc/hosts).
Hope this help.