Obtaining certificate chain for changelogs.ubuntu.com, one moment while we download the changelogs.ubuntu.com certificate and related intermediate certificates...
Refreshing certificate chain and revocation status for changelogs.ubuntu.com, one moment while we re-check the changelogs.ubuntu.com certificate and related intermediate certificates...
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Revocation check via OCSP and CRL for changelogs.ubuntu.com failed
Sorry, the request for changelogs.ubuntu.com could not be completed...
We could not load the certificate for changelogs.ubuntu.com, it might not exist or we could not reach the server, complete the TLS handshake, etc.
Revoked certificates can't and should not be trusted, these certificate will cause errors like "NET::ERR_CERT_REVOKED" in browsers and expose a security risk.