Issue Let's Encrypt Wildcard certificate without main domain in SAN
Currently the Let's Encrypt Wildcard requires that main domain would be hosted on the Plesk server, and pass the HTTP-01 challenge as well as DNS-01 for Let's Encrypt.
However for issue the Wildcard Let's encrypt require only DNS-01 challenge.
The HTTP-01 limits the causing the issue since not always the main domain is hosted on the same server as the subdomains.
Another (easier) option would be to just verify all with the DNS-01 challenge and not use HTTP-01 at all as there are different occasians where HTTP challenges are problematic.