Fetch authentication errors on "make fetchindex" in /usr/ports

[Bob Willcox]

On a recently installed system (from a snapshot):

FreeBSD lando.immure.com 12.1-STABLE FreeBSD 12.1-STABLE r362436 LANDO  amd64

When I attempt to run "make fetchindex" in /usr/ports I get these errors continuously:

/usr/bin/env  fetch -am -o /usr/ports/INDEX-12.bz2 https://www.FreeBSD.org/ports/INDEX-12.bz2
Certificate verification failed for /C=US/O=Let's Encrypt/CN=Let's Encrypt Authority X3
34370502656:error:1416F086:SSL routines:tls_process_server_certificate:certificate verify failed:/usr/src/crypto/openssl/ssl/statem/statem_clnt.c:1915:
fetch: https://www.FreeBSD.org/ports/INDEX-12.bz2: Authentication error
Certificate verification failed for /C=US/O=Let's Encrypt/CN=Let's Encrypt Authority X3
34370502656:error:1416F086:SSL routines:tls_process_server_certificate:certificate verify failed:/usr/src/crypto/openssl/ssl/statem/statem_clnt.c:1915:

Any advice on what I can to do to fix this greatly welcomed. 

Bob

-- 
Bob Willcox    | It's possible that the whole purpose of your life is to
bob at immure.com | serve as a warning to others.
Austin, TX     |