b24.vplab.ru has an AAAA (IPv6) record (2a03:6f01:1:7f99::2) but a test request to this address over port 80 did not succeed. Your web server must have at least one working IPv4 or IPv6 address. 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 b24.vplab.ru/2a03:6f01:1:7f99::2: Get "http://b24.vplab.ru/.well-known/acme-challenge/letsdebug-test": dial tcp [2a03:6f01:1:7f99::2]:80: i/o timeout
Trace:
@0ms: Making a request to http://b24.vplab.ru/.well-known/acme-challenge/letsdebug-test (using initial IP 2a03:6f01:1:7f99::2)
@0ms: Dialing 2a03:6f01:1:7f99::2
@10000ms: Experienced error: dial tcp [2a03:6f01:1:7f99::2]: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
Requests made to the domain
Request to: b24.vplab.ru/2a03:6f01:1:7f99::2, Result: [Address=2a03:6f01:1:7f99::2,Address Type=IPv6,Server=,HTTP Status=0], Issue: AAAANotWorking
Trace:
@0ms: Making a request to http://b24.vplab.ru/.well-known/acme-challenge/letsdebug-test (using initial IP 2a03:6f01:1:7f99::2)
@0ms: Dialing 2a03:6f01:1:7f99::2
@10000ms: Experienced error: dial tcp [2a03:6f01:1:7f99::2]:80: i/o timeout
Request to: b24.vplab.ru/94.228.127.153, Result: [Address=94.228.127.153,Address Type=IPv4,Server=nginx,HTTP Status=301,Number of Redirects=1,Final HTTP Status=401], Issue:
Trace:
@0ms: Making a request to http://b24.vplab.ru/.well-known/acme-challenge/letsdebug-test (using initial IP 94.228.127.153)
@0ms: Dialing 94.228.127.153
@213ms: Server response: HTTP 301 Moved Permanently
@213ms: Received redirect to https://b24.vplab.ru/.well-known/acme-challenge/letsdebug-test
@213ms: Dialing 94.228.127.153
@555ms: Server response: HTTP 401 Unauthorized
A and AAAA records found for this domain
b24.vplab.ru. 0 IN A 94.228.127.153
b24.vplab.ru. 0 IN AAAA 2a03:6f01:1:7f99::2
Challenge update failures for b24.vplab.ru in order https://acme-staging-v02.api.letsencrypt.org/acme/order/5751349/6805816623
acme: challenge update timeout
The IANA public suffix is the TLD of the Registered Domain
The TLD for b24.vplab.ru is: ru
The current status.io status for Let's Encrypt
Operational