BUG #17102: Running "create or replace language plperl" gives error

The following bug has been logged on the website:

Bug reference:      17102
Logged by:          Sergio Basurto
Email address:      sbasurto@soft-gator.com
PostgreSQL version: 13.3
Operating system:   Gentoo
Description:

Hello I try in the following versions:
Version: PostgreSQL 13.3 on x86_64-pc-linux-gnu, compiled by
x86_64-pc-linux-gnu-gcc (Gentoo 9.3.0-r2 p4) 9.3.0, 64-bit

Version: PostgreSQL 13.3 on x86_64-pc-linux-gnu, compiled by
x86_64-pc-linux-gnu-gcc (Gentoo 10.3.0 p1) 10.3.0, 64-bit
In both cases the Perl version is: This is perl 5, version 32, subversion 1
(v5.32.1) built for x86_64-linux

When I run "create or replace language plperl" as user postgres database
complains:
ERROR:  
CONTEXT:  while running Perl initialization

Checking logs "postmaster.log" I found:
2021-07-12 11:38:40.637 CDT [6365] ERROR:  
2021-07-12 11:38:40.637 CDT [6365] CONTEXT:  while running Perl
initialization
2021-07-12 11:38:40.637 CDT [6365] STATEMENT:  create or replace language
plperl;
Can't locate utf8_heavy.pl in @INC (@INC contains: /etc/perl
/usr/local/lib64/perl5/5.32/x86_64-linux /usr/local/lib64/perl5/5.32
/usr/lib64/perl5/vendor_perl/5.32/x86_64-linux
/usr/lib64/perl5/vendor_perl/5.32 /usr/lib64/perl5/5.32/x86_64-linux
/usr/lib64/perl5/5.32 /usr/lib64/perl5/vendor_perl/5.30.3
/usr/lib64/perl5/vendor_perl/5.28.2) at -e line 103.

I found that utf8_heavy.pl is not longer available in Perl as tell in
https://bugzilla.redhat.com/show_bug.cgi?id=1855963.

I am not sure if this is a bug but I cannot use plperl in postgresql 13.3
because this problem, I try to solve it coping the file utf8_heavy.pl to
required location from other machine but now I get:

ERROR:  XX000: attempt to redefine parameter "plperl.use_strict"
LOCATION:  define_custom_variable, guc.c:8659

2021-07-12 12:43:02.012 CDT [14745] ERROR:  
2021-07-12 12:43:02.012 CDT [14745] CONTEXT:  while running Perl
initialization
2021-07-12 12:43:02.012 CDT [14745] STATEMENT:  create or replace language
plperl;
2021-07-12 12:49:28.630 CDT [14745] ERROR:  attempt to redefine parameter
"plperl.use_strict"

Also try with "create or replace language plperlu" and get same errors.

Please let me know if I need to supply more information or I can help in any
way.

Best Regards,