Hi silhouett,
Vasyl Martyniuk helped me to find out what’s wrong with my AAM installation.
The solution I used is to replace directly in the database the capabilities of my Super-Admin user.
In the table “wp_usermeta”, I found the “wp_capabilities” row associated to my Super-Admin user and I replaced the value by :
a:2 {s:13:”administrator”;s:1:”1″;s:11:”super_admin”;s:1:”1″;}
Hope it helps.