Obtaining certificate chain for concerto.ee.kit.edu, one moment while we download the concerto.ee.kit.edu certificate and related intermediate certificates...
Refreshing certificate chain and revocation status for concerto.ee.kit.edu, one moment while we re-check the concerto.ee.kit.edu certificate and related intermediate certificates...
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Revocation check via OCSP and CRL for concerto.ee.kit.edu failed
Sorry, the request for concerto.ee.kit.edu could not be completed...
We could not load the certificate for concerto.ee.kit.edu, 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.