Let's Debug

Test result for mail.adventure-city-roleplay.de using http-01

No valid A or AAAA records could be ultimately resolved for mail.adventure-city-roleplay.de. This means that Let's Encrypt would not be able to connect to your domain to perform HTTP validation, since it would not know where to connect to.
No A or AAAA records found.
The IANA public suffix is the TLD of the Registered Domain
The TLD for mail.adventure-city-roleplay.de is: de
The current status.io status for Let's Encrypt

Submitted Aug 7 02:11:46 2023. Sat in queue for 3ms. Completed in 1s. Hide verbose information.