How to enable ACMEv2 ?

chudak

I got an email from letsencrypt.org:

"According to our records, the software client you're using to get Let's
Encrypt TLS/SSL certificates issued or renewed at least one HTTPS certificate
in the past two weeks using the ACMEv1 protocol. Here are the details of one
recent ACMEv1 request from each of your account(s):

Client IP address: XXX

User agent: acme.sh/2.8.6 (https://github.com/acmesh-official/acme.sh)

Hostname(s): "YYY"

Request time: 2020-05-12 18:16:07 UTC

Beginning June 1, 2020, we will stop allowing new domains to validate using
the ACMEv1 protocol."