Hi,
your template override Joomla user page with non Bootstrap compliant, in this Override is used DL html tag to show list of fields, this is wrong for semantic value of code.

DL list not have a semantic value for HTML forms, it mean "definition list".

To solve this you need to remove Override:
- rename file /templates/mastorantza/html/com_users/registration/default.php to /templates/mastorantza/html/com_users/registration/default.old.php (registration page)
- rename file /templates/mastorantza/html/com_users/profile/edit.php to /templates/mastorantza/html/com_users/profile/edit.old.php (edit profile page)