addons: Duck DNS is not renewing expired certificate

I have Duck DNS 1.11 Google Chrome show certificate from Let’s Encrypt is expired March 21 But Duck DNS says

# INFO: Using main config file /data/workdir/config
+ Account already registered!
[20:00:51] INFO: OK
------ip-----
NOCHANGE
# INFO: Using main config file /data/workdir/config
Processing gavrhome.duckdns.org
 + Checking domain name(s) of existing cert... unchanged.
 + Checking expire date of existing cert...
 + Valid till May 20 20:07:53 2020 GMT Certificate will not expire
(Longer than 30 days). Skipping renew!
[20:06:00] INFO: OK
-------ip-----
NOCHANGE