last week the other server is fine for issue SSL. but now encountered to error like this
IssueFromLetsEncrypt
ERROR
A test authorization for wplesk.citrahost.com to the Let's Encrypt staging service has revealed issues that may prevent any certificate for this domain being issued.
103.123.16.178: Fetching http://wplesk.citrahost.com/.well-known/acme-challenge/VLO1RvsRwcSjw5uyiyn3YuS-xlDNsQvYeWmBLoIh6YA: Timeout during connect (likely firewall problem)
ERROR
A test authorization for uplesk.citrahost.com to the Let's Encrypt staging service has revealed issues that may prevent any certificate for this domain being issued.
103.123.16.140: Fetching http://uplesk.citrahost.com/.well-known/acme-challenge/3fhNVUk7WhCl84Nm_iE71et94_C6gJxqTaPZRDYmKz4: Timeout during connect (likely firewall problem)
Port 80 and 443 is opened, all of my server is fine nothing changes on firewall side.