Please put <c>...</c> around your long data line! (And please include a newline within those tags.)

The data size doesn't jive.

The cipher text, once base64 decoded, is 576 ( 72*8 ) bytes long.
Your plain text is 550 ( 68*8+6 ) bytes long.
Your padded plain text is 552 ( 69*8 ) bytes long.
The IV is 8 bytes long.
There are 16 ( 576-(552+8) ) unaccounted bytes

Unless the CRLF is used for line endings.

The cipher text, once base64 decoded, is 576 ( 72*8 ) bytes long.
Your plain text is 560 ( 70*8+0 ) bytes long.
Your padded plain text is 568 ( 71*8 ) bytes long.
The IV is 8 bytes long.
There are 0 ( 576-(568+8) ) unaccounted bytes

At least your Java code outputs as many bytes as expected.

The following should produce the plain text.

use strict;
use warnings;

use Crypt::CBC      qw( );
use List::MoreUtils qw( apply );
use MIME::Base64    qw( decode_base64 );

my $key = 'Abcdefghijklmnopqrstuvwxyz1234567890';

my $ctext = decode_base64(apply { s/\s//g } <<'__EOI__');
mGWcw1XJV3ooXbGvzBuShOA2gwcUnW11NZnHm1Nm
8JQktRSoaAKl369jL8ZLnJNF71I5ctZq8wGGtfov
iLj6PoXZWlzcasgBBUMefjGa0h+L53/VODmqCDaL
6jnZycB5VTngY5gt/9VpYxVW0KB5yR0TJrhHQa02
Vgn1I9ePtmbJfOkALXZPwY0H8MDULkzIYX409iSm
6zgu76UvW81qpJiakFDi9jmIbL4NVWYRlVR1xLRC
HiM8X8q0yCT1ZQO9HJE8vHc/jKdEOi8QGNyAOtdd
ku7Ikg4Pzwpk7g+R/TOCx7Q8xDKbV93sFHu1s3co
pZrpCcNmd8Oy1CFazZ5FweWwsFqfgxMqopMrtaG6
Qc1J7cB3fYpI2RDN6xbAJ8HPZWGdOQsobopv+Czt
GFuzVaVfwz8YXrLEXlbRFfv8Cpt8Q320NAAhwjFj
eEUMyPCpzVZaBske4NDJ++7JomijlS8H8cHmmD6P
Hbopy41W8BF9tsV9nqXgYeiVna98MNTEkyToyP/Z
kBhGYJcutv3s9pG7SydwuKCxCd+Dugusnu8lM10/
5UmGJ7YTGFCJvtfpXR9XoMCQ++eT4/YN9kZlim+2
bkjh01xPnG9r7PChWAVxpUVjOisGlZKrPV6tQRPU
qwQ0die7XienUt5e+jACACGMqXWA4O8P5sg/iT3w
Z2+dDIQiUnxCIATKn74/B8V9PDdtHnr5XOP5KPKK
aYcz/gXt1Q6WkWawUIoLvCkobkm5o7MXeAiJCtet
emfA86bV
__EOI__

my $blksz = 8;  # Chicken-egg UI problem with Crypt::CBC.

my $iv = substr($ctext, 0, $blksz, '');

my $cipher = Crypt::CBC->new(
   -cipher => 'Blowfish',
   -key    => $key,
   -header => 'none',
   -iv     => $iv,
);

binmode(STDOUT);
print($cipher->decrypt($ctext));
[download]

...But it doesn't. I'll have to study how the key is used by both libraries. Or maybe it's some byte ordering problem? But I don't think so from what I've seen.

Your padding method could be problematic. You use
byte fill = (byte)mod;           while (i < len) { inBuf[i++] = (byte)fill; }
but Crypt::CBC expects
byte fill = (byte)(len-origLen); while (i < len) { inBuf[i++] = (byte)fill; }