+my $warnPrefKohaAdminEmailAddress = !Koha::Email->is_valid(C4::Context->preference('KohaAdminEmailAddress'));
+
+my $c = Koha::Items->filter_by_visible_in_opac->count;
+my @warnings = C4::Context->dbh->selectrow_array('SHOW WARNINGS');
+my $warnPrefOpacHiddenItems = $warnings[2];
+
+my $invalid_yesno = Koha::Config::SysPrefs->search(
+ {
+ type => 'YesNo',
+ value => { -or => { 'is' => undef, -not_in => [ "1", "0" ] } }
+ }
+);
+$template->param( invalid_yesno => $invalid_yesno );
+