bootstrap fails due to certification expiration

[KO Myung-Hun]

Hi/2.

I'm trying to build GNU Make of git repo on OS/2. However, I've
encountered a problem at bootstrap step like this:

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./bootstrap: Bootstrapping from checked-out make sources...
Already on 'stable-202207'
Your branch is up to date with 'origin/stable-202207'.
./autopull.sh: consider installing git-merge-changelog from gnulib
./autopull.sh: getting translations into po/.reference for make...
ERROR: cannot verify translationproject.org's certificate, issued by
'CN=R3,O=Let\'s Encrypt,C=US':
  Issued certificate has expired.
To connect to translationproject.org insecurely, use
`--no-check-certificate'.
./bootstrap: autopull.sh failed.
-----

What should I do?

-- 
KO Myung-Hun

Using Mozilla SeaMonkey 2.7.2
Under OS/2 Warp 4 for Korean with FixPak #15
In VirtualBox v6.1.40 on Intel Core i7-3615QM 2.30GHz with 12GB RAM

Korean OS/2 User Community : http://www.os2.kr/