I have a small Wordpress Multisite Network. It includes 3 sites at subdomain(1,2,3)@domain.com and one at a separatdomain.com
I followed the Virtualmin tutorial on how to install LetsEncrypt, however after adding the domains (domain.com, *.domain.com, and separatedomain.com) I get the error message ".. request failed : Web-based validation failed : Wildcard hostname *.domain.com can only be validated in DNS mode DNS-based validation failed : Wildcard hostname *.domain.com can only be validated when the native Let's Encrypt client is installed"
I'm not sure what "native Let's Encrypt client" is. Can anybody point me in the right direction here?