See https://metacpan.org/pod/CGI::Ex::Validate#GROUP-OPTIONS "group" isn't radio

If you view the source to see sub generate_form { you'll see it takes a htype option , so specify htype somehow ... check the dist tree for an example of usage (grep "radio|check|htype" https://metacpan.org/release/CGI-Ex )

if that fails study the code 

        } elsif ($type eq 'radio' || $type eq 'checkbox') {
            my $e = $field->{'enum'}  || [];
            my $l = $field->{'label'} || $e;
            my $I = @$e > @$l ? $#$e : $#$l;
            for (my $i = 0; $i <= $I; $i++) {
                my $_e = $e->[$i];
                $_e =~ s/\"/&quot;/g;
                $input .= "<div class=\"option\"><input type=\"$type\"
+ name=\"$field->{'field'}\" id=\"$field->{'field'}_$i\" value=\"$_e\"
+>"
                    .(defined($l->[$i]) ? $l->[$i] : '')."</div>\n";
            }

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In reply to Re: validation built form with cgi::ex::validate that has radio buttons by Anonymous Monk
in thread validation built form with cgi::ex::validate that has radio buttons by GertMT

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