Hi,
Sorry for issue occured with ssl when access of site.
Certificates as delivery by Let's Encrypt.
Slitaz certificates as validate from August 9 2021 to November 9, 2021.
Intermediate R3 expired today September 29, 2021.
Normally, chains avoid issue between old R3 and new.
I force renew certs, now certs is signed with new certs (valid until 2025).
Again sorry for apology.
Shann