cryptic pkgin SSL cert error

[beaker%sdf.org@localhost (beaker)]

Hello,

I have a 9.3/i386 VM on which I recently ran
  $ sudo pkgin update ; sudo pkgin upgrade ;sudo pkgin autoremove

which worked but subsequent attempts to use pkgin report the following error:

--
$ sudo pkgin update                             
cleaning database from http://cdn.netbsd.org/pub/pkgsrc/packages/NetBSD/i386/9.3/All entries...
reading local summary...
processing local summary...
processing remote summary (https://cdn.netbsd.org/pub/pkgsrc/packages/NetBSD/i386/9.3/All)...
3061459968:error:1416F086:SSL routines:tls_process_server_certificate:certificate verify failed:/usr/src/crypto/external/bsd/openssl/dist/ssl/statem/statem_clnt.c:1921:
3061459968:error:1416F086:SSL routines:tls_process_server_certificate:certificate verify failed:/usr/src/crypto/external/bsd/openssl/dist/ssl/statem/statem_clnt.c:1921:
3061459968:error:1416F086:SSL routines:tls_process_server_certificate:certificate verify failed:/usr/src/crypto/external/bsd/openssl/dist/ssl/statem/statem_clnt.c:1921:
pkgin: Could not fetch https://cdn.netbsd.org/pub/pkgsrc/packages/NetBSD/i386/9.3/All/pkg_summary.xz: Authentication error
--

A work-around is to edit /usr/pkg/etc/pkgin/repositories.conf so
it only uses http not https but I'd really rather not do that going
forward so I'm looking for some guidance on how to fix wahatever
is causing this SSL certificate verification error.

System info:
$ pkgin -v
pkgin 23.8.1 (using SQLite 3.26.0)
$ uname -a |cut -d' ' -f4-12
NetBSD 9.3_STABLE (GENERIC) #0: Mon Mar 25 15:54:20 UTC
$ uname -m
i386