Para openSUSE Tumbleweed corra o seguinte como root:
zypper addrepo https://download.opensuse.org/repositories/home:Monex:stable/openSUSE_Tumbleweed/home:Monex:stable.repo
zypper refresh
zypper install perl-XML-Parser
Para 15.6 corra o seguinte como root:
zypper addrepo https://download.opensuse.org/repositories/home:Monex:stable/15.6/home:Monex:stable.repo
zypper refresh
zypper install perl-XML-Parser
Para 15.5 corra o seguinte como root:
zypper addrepo https://download.opensuse.org/repositories/home:Monex:stable/15.5/home:Monex:stable.repo
zypper refresh
zypper install perl-XML-Parser