Lets Encrypt - Problem connecting to server (get for https://acme-v01.api.letsencrypt.org/directory; curl returned with 6)

Installation Home Assistant OS
5

If I do this:

Create this file with the following contents to set two DNS, firstly your network’s DNS server, and secondly the Google DNS server to fall back to in case that server isn’t available:

/etc/docker/daemon.json:

{
“dns”: [“192.168.0.1”, “8.8.8.8”]
}
Then restart the docker service:

sudo service docker restart

Then, the DuckDNS addon starts and Letsencrytp is accessed properly, but the other addons break.

P.S.: I am running Hassio in a Ubuntu host.