Unable to get Certs from DuckDNS

I am helping a buddy install HA on a dell thinclient. We followed the step by installing Ubuntu, then installing etcher and flashing HA onto the computer. Everything seems to be working correctly. However, whenever we try to install DuckDNS, we keep getting the following error:

ERROR: Problem connecting to server (get for https://acme-v02.api.letsencrypt.org/directory; curl returned with 6)

EXPECTED value GOT EOF

Google has not been any help. Does anyone have any idea on what is causing this issue?