A test authorization for staging.website2022.hfm-nuernberg.de to the Let's Encrypt staging service has revealed issues that may prevent any certificate for this domain being issued.
Connection refused
Challenge update failures for staging.website2022.hfm-nuernberg.de in order https://acme-staging-v02.api.letsencrypt.org/acme/order/5751349/2306545448
acme: error code 400 "urn:ietf:params:acme:error:connection": Connection refused
The IANA public suffix is the TLD of the Registered Domain
The TLD for staging.website2022.hfm-nuernberg.de is: de
4 Certificates contributing to rate limits for this domain
Serial: 301670867719639607447729137961775564888864
NotBefore: 2022-04-14 10:26:21 +0000 UTC
Names: [production.website2022.hfm-nuernberg.de]
Serial: 298122186410820415710278848960062630973507
NotBefore: 2022-04-14 09:26:16 +0000 UTC
Names: [production.website2022.hfm-nuernberg.de]
Serial: 270098448513464485859825630889018986113758
NotBefore: 2022-04-08 17:50:42 +0000 UTC
Names: [stellen.hfm-nuernberg.de]
Serial: 326693546199780946213787888757295379591349
NotBefore: 2022-04-07 20:49:33 +0000 UTC
Names: [hfm-n.de hfm-nuernberg.de www.hfm-n.de www.hfm-nuernberg.de]
The current status.io status for Let's Encrypt
Operational