Let's Debug

Test result for bbb.mahale-ggmbh.de using http-01

A private, inaccessible, IANA/IETF-reserved IP address was found for bbb.mahale-ggmbh.de. Let's Encrypt will always fail HTTP validation for any domain that is pointing to an address that is not routable on the internet. You should either remove this address and replace it with a public one or use the DNS validation method instead.
fe80::4cd3:54ff:fee3:105c
Debug
A and AAAA records found for this domain
bbb.mahale-ggmbh.de. 0 IN A 45.146.254.209
bbb.mahale-ggmbh.de. 0 IN AAAA fe80::4cd3:54ff:fee3:105c
Debug
The IANA public suffix is the TLD of the Registered Domain
The TLD for bbb.mahale-ggmbh.de is: de
Debug
1 Certificates contributing to rate limits for this domain

Serial: 316664924018216221731446946161782547698575
NotBefore: 2023-02-16 13:23:24 +0000 UTC
Names: [chat.mahale-ggmbh.de]

Debug
The current status.io status for Let's Encrypt
Operational

Submitted Feb 17 15:34:41 2023. Sat in queue for 4ms. Completed in 2s. Hide verbose information.