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Revocation check via OCSP and CRL for ppsn2020.liacs.leidenuniv.nl failed
Sorry, the request for ppsn2020.liacs.leidenuniv.nl could not be completed...
We could not load the certificate for ppsn2020.liacs.leidenuniv.nl, 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.