Wildcard SSL Letsencrypt - how to?


I have two running Hestia machines ( v1.5.13, Ubuntu 20.04) with own DNS (bind cluster).
All seems to be fine, - NS records are correct on the primary and slave hosts.

I want to get the Wildcard Letsencrypt SSL for my domain www.test.com.ua
But when I added this domain to Hestia: test.com.ua + alias *.test.com.ua - I got “Error code: 2”.

What i’m doing wrong??? How to get the Wildcard SSL in this case?
Please advise!