shareorama.duckdns.org has an A (IPv4) record (138.74.182.197) 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.
A timeout was experienced while communicating with shareorama.duckdns.org/138.74.182.197: Get "http://shareorama.duckdns.org/.well-known/acme-challenge/letsdebug-test": context deadline exceeded
Trace:
@0ms: Making a request to http://shareorama.duckdns.org/.well-known/acme-challenge/letsdebug-test (using initial IP 138.74.182.197)
@0ms: Dialing 138.74.182.197
@10000ms: Experienced error: context deadline exceeded
A test authorization for shareorama.duckdns.org to the Let's Encrypt staging service has revealed issues that may prevent any certificate for this domain being issued.
138.74.182.197: Fetching http://shareorama.duckdns.org/.well-known/acme-challenge/u_F2MMb0B6YPNBS8Zv6oVLIk57xioz_iVS-tVCVshLE: Timeout during connect (likely firewall problem)