Yes, it will expire 20 mins from now: at exactly

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# Sep 30 14:01:15 2021 GMT

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Check yourself file "ca.crt" with

openssl x509 -enddate -noout -in ca.crt

Useful links:

* https://blog.devgenius.io/rhel-centos-7-fix-for-lets-encrypt...

* https://www.openssl.org/blog/blog/2021/09/13/LetsEncryptRoot...

* https://scotthelme.co.uk/lets-encrypt-old-root-expiration/

* the discussion in HN at https://hn.algolia.com/?dateRange=pastMonth&page=0&prefix=fa...

expired:

btw: on Centos 7 server you NEED to update package: ca-certificates