eldernode2.ddns.net has an A (IPv4) record (45.76.43.163) but a request to this address over port 80 did not succeed. Your web server must have at least one working IPv4 or IPv6 address.
Get "http://eldernode2.ddns.net/.well-known/acme-challenge/letsdebug-test": dial tcp 45.76.43.163:80: connect: connection refused
Trace:
@0ms: Making a request to http://eldernode2.ddns.net/.well-known/acme-challenge/letsdebug-test (using initial IP 45.76.43.163)
@0ms: Dialing 45.76.43.163
@84ms: Experienced error: dial tcp 45.76.43.163:80: connect: connection refused
A test authorization for eldernode2.ddns.net to the Let's Encrypt staging service has revealed issues that may prevent any certificate for this domain being issued.
45.76.43.163: Fetching http://eldernode2.ddns.net/.well-known/acme-challenge/rs6pxjXBBKT7EZazO9RdyP8ja3eE3HsRIGU-82ZKcxQ: Connection refused