Opkg update problem - Invalid SSL certificate (Letsencrypt global root cert expiration)

[hnyman]

First guess:
Probably due to letsencrypt root certificate expiration today...

See

Cert verify failed: BADCERT_EXPIRED (Letsencrypt global root cert)

Hi, At 2021-09-30 14:01:16 UTC, our openwrt devices using curl stopped working with the following error. % curl --cacert /etc/ssl/certs/ca-certificates.crt https://www.somedomain.com/ curl: (51) Cert verify failed: BADCERT_EXPIRED We logged into one of the devices and updated the ca-certificates package but no change. Does anyone know what's going on? We didn't make any changes and certs are valid on the sites we've tested against.

DST Root CA X3 Expiration (September 2021) - Let's Encrypt