sigla.sema.ma.gov.br has an A (IPv4) record (177.54.132.251) but a request to this address over port 80 did not succeed.
A timeout was experienced while communicating with sigla.sema.ma.gov.br/177.54.132.251: Get http://sigla.sema.ma.gov.br/.well-known/acme-challenge/letsdebug-test: context deadline exceeded
Trace:
@0ms: Making a request to http://sigla.sema.ma.gov.br/.well-known/acme-challenge/letsdebug-test (using initial IP 177.54.132.251)
@0ms: Dialing 177.54.132.251
@10000ms: Experienced error: context deadline exceeded
A test authorization for sigla.sema.ma.gov.br to the Let's Encrypt staging service has revealed issues that may prevent any certificate for this domain being issued.
Fetching http://sigla.sema.ma.gov.br/.well-known/acme-challenge/TNdxrRqamyF_4wu9ymd1iM_J5V6AbRTZlk6_j9cbIGA: Timeout during connect (likely firewall problem)