A test authorization for swarm.spicyweb.de to the Let's Encrypt staging service has revealed issues that may prevent any certificate for this domain being issued.
Timeout during read (your server may be slow or overloaded)
CAA records control authorization for certificate authorities to issue certificates for a domain
spicyweb.de. 0 IN CAA 0 issue "letsencrypt.org"
Challenge update failures for swarm.spicyweb.de in order https://acme-staging-v02.api.letsencrypt.org/acme/order/5751349/110014989
acme: error code 400 "urn:ietf:params:acme:error:connection": Timeout during read (your server may be slow or overloaded)
The IANA public suffix is the TLD of the Registered Domain
The TLD for swarm.spicyweb.de is: de
1 Certificates contributing to rate limits for this domain
Serial: 307570999193755230809701546728272117010650
NotBefore: 2020-07-04 09:20:22 +0000 UTC
Names: [stat.spicyweb.de stats.spicyweb.de]
The current status.io status for Let's Encrypt
Operational