I see you have in

badlop — Wed, 12 Oct 2016 13:54:07 +0000

I see you have in mod_register this option:

    ip_access: trusted_network

And then in access_rules you have:

  trusted_network:
    - deny: loopback

And finally in ACL:

  loopback:
    ip:
      - "127.0.0.0/8"

This means that you are denying access to registration to any client in the adresses 127.0.0.*

ejabberd - Comments for "register on 16.09 return error 403 Denied by ACL"