Thank you James!
Your code after few adjustments works like a charm.

#!/usr/bin/perl

use strict;
use warnings;
use File::Slurp;
use File::Path qw( remove_tree );

my $dir  = "/opt/ssi/cache";
my $err_list = "/home/az/log.txt";
my @dirs = read_dir( $dir );

for (@dirs) {
    next if ( -f $_ );
    if ( $_ !~ /(?:_)/ ) {
        my $removed = "$dir/$_";
        remove_tree( $removed , {
      verbose => 1,
      error  => \my $err_list,
  });

        print "removed : $removed\n";
    }
}
[download]