I found this solution:
- restore from GUI
- from linux cli create a sym link: ln -s /var/www/html/admin /var/www/admin
- fwconsole restart
- go to gui Advanced Settings → Directory Layout and change “FreePBX Web Root Dir” from /var/www to /var/www/html
- Apply
- fwconsole restart
Hope this can be useful to someone, I fixed ! Thanks !