Error 761 when trying to register a new deployment

I am trying to register a new deployment
i have a portal account that i can access but when i try to register through freepbx i get error 761

Hi,
modify /etc/resolv.conf as indicated

nameserver 127.0.0.1 # mandatory
nameserver 8.8.8.8 # your first préfered DNS
nameserver 8.8.8.8 # your second prefered DNS

You can also activate your SNG by CLI:
root# php /var/www/html/admin/modules/sysadmin/bin/register_new --email=your_address_email

The supported way to register via CLI is in the wiki:
https://wiki.freepbx.org/display/FPG/fwconsole+sysadmin+commands