Upgrade from Openfire 4.0.3 to 4.1.1 breaks bot written with Perl Net::XMPP

I have no experience with this library. Perhaps it depends on non-SASL authentication, for which support was removed from Openfire in 4.1.0? Since then, there is a new plugin, named ‘nonsaslauthentication’ that you can install to restore this functionality, if you must.