I had updated my tiki wiki from version 12.2 to 16.2, after that the login using ldap is not working anymore, i can login normally if i use the login tiki without ldap, i saw that the configuration from the previous version is still the same, nothing changed in the ldap tab in the administration control panel. When i try to login only give me page with HTTP ERROR 500. In the tiki-syslog.php only give me the message : UsersLib::_ldap_sync_and_update_lastlogin() . Any ideas what happened ? Thank you.