mrrobotcloud.duckdns.org has an A (IPv4) record (192.99.160.40) 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://mrrobotcloud.duckdns.org/.well-known/acme-challenge/letsdebug-test: dial tcp 192.99.160.40:80: connect: connection refused
Trace:
@0ms: Making a request to http://mrrobotcloud.duckdns.org/.well-known/acme-challenge/letsdebug-test (using initial IP 192.99.160.40)
@0ms: Dialing 192.99.160.40
@11ms: Experienced error: dial tcp 192.99.160.40:80: connect: connection refused
A test authorization for mrrobotcloud.duckdns.org to the Let's Encrypt staging service has revealed issues that may prevent any certificate for this domain being issued.
Fetching http://mrrobotcloud.duckdns.org/.well-known/acme-challenge/NddNGzEf78Ov_SjcKHIgZ_GAF3TlVubJpcjwqkuwNzg: Connection refused
Requests made to the domain
Request to: mrrobotcloud.duckdns.org/192.99.160.40, Result: [Address Type=IPv4,Server=,HTTP Status=0], Issue: ANotWorking
Trace:
@0ms: Making a request to http://mrrobotcloud.duckdns.org/.well-known/acme-challenge/letsdebug-test (using initial IP 192.99.160.40)
@0ms: Dialing 192.99.160.40
@11ms: Experienced error: dial tcp 192.99.160.40:80: connect: connection refused
A and AAAA records found for this domain
mrrobotcloud.duckdns.org. 0 IN A 192.99.160.40
Challenge update failures for mrrobotcloud.duckdns.org in order https://acme-staging-v02.api.letsencrypt.org/acme/order/5751349/20301966
acme: error code 400 "urn:ietf:params:acme:error:connection": Fetching http://mrrobotcloud.duckdns.org/.well-known/acme-challenge/NddNGzEf78Ov_SjcKHIgZ_GAF3TlVubJpcjwqkuwNzg: Connection refused
The IANA public suffix is the TLD of the Registered Domain
The TLD for mrrobotcloud.duckdns.org is: org
1 Certificates contributing to rate limits for this domain
Serial: 417319055578290286944709400725202947188573
NotBefore: 2019-01-16 19:40:10 +0000 UTC
Names: [ffmpeg.mrrobotcloud.duckdns.org]
The current status.io status for Let's Encrypt
Operational