vicitocande.duckdns.org has an A (IPv4) record (83.55.31.67) 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 vicitocande.duckdns.org/83.55.31.67: Get "http://vicitocande.duckdns.org/.well-known/acme-challenge/letsdebug-test": dial tcp 83.55.31.67:80: i/o timeout
Trace:
@0ms: Making a request to http://vicitocande.duckdns.org/.well-known/acme-challenge/letsdebug-test (using initial IP 83.55.31.67)
@0ms: Dialing 83.55.31.67
@10000ms: Experienced error: dial tcp 83.55.31.67:80: i/o timeout
An internal error occurred while checking the domain
An unknown issue occurred when performing a test authorization against the Let's Encrypt staging service: acme: challenge update timeout