Install libnet-jabber-loudmouth-perl by entering the following commands in the terminal:
sudo apt update sudo apt install libnet-jabber-loudmouth-perl
Perl interface for the loudmouth jabber library
Net::Jabber::Loudmouth is a perl interface for libloudmouth, Lightweight C Jabber library. It allows you to do the same stuff with Net::Jabber, but with a nicer interface and much faster, because most of the code is written in C.