Sorry if I sound stupid, but I don´t know what to say now.
I can´t recall enabling registration anywhere – you mean WP settings or Buddypress settings? I haven´t found nothing related to this so far.
I have another sites in production, but linked to other accounts and hosted in different places. That´s a single WP site,
@mercime thanks a lot.
I did it all. BuddyPress required me to change 15 files, not 16.
Everything seems aligned now, but there ´s something wrong with the register.php page link which is navigating back to the home page. I did that one twice, using a clean backup file I have. Same results.
Clues?
Again, thank you very much.