To solve this, we need to install the module.

First locate the module’s package:

sudo apt-cache search perl XML::Parser

libxml-dom-perl - Perl module for building DOM Level 1 compliant doc structures

libxml-parser-perl - Perl module for parsing XML files

libxml-perl - Perl modules for working with XML

libxml-sax-expat-perl - Perl module for a SAX2 driver for Expat (XML::Parser)

libxml-twig-perl - Perl module for processing huge XML documents in tree mode

libdbix-xml-rdb-perl - perl module for creating XML from a DBI datasource

libmodule-versions-report-perl - Report versions of all modules in memory

libxml-autowriter-perl - Perl module to produce DOCTYPE-based XML output

libxml-checker-perl - Perl modules for validating XML

libxml-encoding-perl - Perl module for parsing encoding map XML files

libxml-filter-saxt-perl - Perl module for replicating events to several event handlers

libxml-handler-trees-perl - Perl module for building tree structures using PerlSAX handlers

libxml-parser-lite-tree-perl - lightweight XML tree builder

libxml-rsslite-perl - lightweight, "relaxed" RSS (and XML-ish) parser

libxml-simpleobject-enhanced-perl - Perl module which enhances libxml-simpleobject-perl

libxml-simpleobject-perl - Objectoriented Perl interface to a parsed XML::Parser tree

libxml-xslt-perl - Perl module for processing XSLT[/code]

So the package is:
libxml-parser-perl - Perl module for parsing XML files[/code]

Now install with
sudo apt-get install libxml-parser-perl[/code]