Maybe this one would help another person's who have the same problem:
I wanted to share the solution I found in case others run into the same problem. The issue stemmed from Proxmox 7.4 using an older version of the Plesk DNS plugin, which utilizes the XML API request:
<packet>
<customer>...
Hi,
my Server:
Plesk Obsidian v18.0.58_build1800240123.15 os_Ubuntu 20.04
Web Admin Edition
I want to use the DNS plugin "pleskxml" from Acme to order lets encrypt certificates over proxmox and make a dns auth over my plesk server where my domain is managed by the plex dns.
I used my admin...