mydata.energy has an AAAA (IPv6) record (2605:de00:1:1:4a:46:0:116) but a test request to this address over port 80 did not succeed. Let's Encrypt will prefer to use AAAA records, if present, and will not fall back to IPv4 records. You should either ensure that validation requests to this domain succeed over IPv6, or remove its AAAA record.
A timeout was experienced while communicating with mydata.energy/2605:de00:1:1:4a:46:0:116: Get http://mydata.energy/.well-known/acme-challenge/letsdebug-test: context deadline exceeded
Trace:
@0ms: Making a request to http://mydata.energy/.well-known/acme-challenge/letsdebug-test (using initial IP 2605:de00:1:1:4a:46:0:116)
@0ms: Dialing 2605:de00:1:1:4a:46:0:116
@10000ms: Experienced error: context deadline exceeded
A test authorization for mydata.energy to the Let's Encrypt staging service has revealed issues that may prevent any certificate for this domain being issued.
Fetching http://mydata.energy/.well-known/acme-challenge/r9SHsDjB4vjhD4iQlNojCk_fWQHq02k_rz9moqj1bVY: Timeout after connect (your server may be slow or overloaded)
Requests made to the domain
Request to: mydata.energy/2605:de00:1:1:4a:46:0:116, Result: [Address Type=IPv6,Server=,HTTP Status=0], Issue: AAAANotWorking
Trace:
@0ms: Making a request to http://mydata.energy/.well-known/acme-challenge/letsdebug-test (using initial IP 2605:de00:1:1:4a:46:0:116)
@0ms: Dialing 2605:de00:1:1:4a:46:0:116
@10000ms: Experienced error: context deadline exceeded
Request to: mydata.energy/52.64.140.75, Result: [Address Type=IPv4,Server=nginx/1.10.3 (Ubuntu),HTTP Status=404], Issue:
Trace:
@0ms: Making a request to http://mydata.energy/.well-known/acme-challenge/letsdebug-test (using initial IP 52.64.140.75)
@0ms: Dialing 52.64.140.75
@465ms: Server response: HTTP 404 Not Found
A and AAAA records found for this domain
mydata.energy. 0 IN A 52.64.140.75
mydata.energy. 0 IN AAAA 2605:de00:1:1:4a:46:0:116
Challenge update failures for mydata.energy in order https://acme-staging-v02.api.letsencrypt.org/acme/order/5751349/2675301
acme: error code 400 "urn:ietf:params:acme:error:connection": Fetching http://mydata.energy/.well-known/acme-challenge/r9SHsDjB4vjhD4iQlNojCk_fWQHq02k_rz9moqj1bVY: Timeout after connect (your server may be slow or overloaded)
The IANA public suffix is the TLD of the Registered Domain
The TLD for mydata.energy is: energy
The current status.io status for Let's Encrypt
Operational