Denied by ACL ejabberd 17.01

I'm getting the error response.

Some of my settings in the .yml file:

ip_access: 
   trusted_network

trusted_network:
    - allow: loopback

loopback:
    ip:
      - "127.0.0.0/8"

mod_register:
    ip_access: trusted_network
    access: register

I'm trying to insert by node-XMPP, using the admin client.
Here's my stanza:

let stanza = new Client.Stanza('iq', {type: 'set', id: 'reg1', to: 'myserver'})
        .c('query', {xmlns: 'jabber:iq:register'})
        .c('username').t(newUserId).up()  // Give a new username
        .c('name').t(newUserName).up()  // Give a new user's password
        .c('password').t(newUserPass).up()  // Give a new user's password
    _connection.send(stanza);

Where the _connection variable is the connection instantiated with the admin account.

Can anyone help me?