Let's Debug

Test result for www.emplacaweb.com.br using http-01

www.emplacaweb.com.br has an AAAA (IPv6) record (2a02:4780:1:1::1:9b66) 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.
Get "http://www.emplacaweb.com.br/.well-known/acme-challenge/letsdebug-test": dial tcp [2a02:4780:1:1::1:9b66]:80: connect: connection refused

Trace:
@0ms: Making a request to http://www.emplacaweb.com.br/.well-known/acme-challenge/letsdebug-test (using initial IP 2a02:4780:1:1::1:9b66)
@0ms: Dialing 2a02:4780:1:1::1:9b66
@22ms: Experienced error: dial tcp [2a02:4780:1:1::1:9b66]:80: connect: connection refused
Error
www.emplacaweb.com.br has an A (IPv4) record (45.15.24.138) 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 "https://emplacaweb.com.br/.well-known/acme-challenge/letsdebug-test": dial tcp [2a02:4780:1:1::1:9b66]:443: connect: connection refused

Trace:
@0ms: Making a request to http://www.emplacaweb.com.br/.well-known/acme-challenge/letsdebug-test (using initial IP 45.15.24.138)
@0ms: Dialing 45.15.24.138
@44ms: Server response: HTTP 301 Moved Permanently
@44ms: Received redirect to https://emplacaweb.com.br/.well-known/acme-challenge/letsdebug-test
@2012ms: Dialing 2a02:4780:1:1::1:9b66
@2035ms: Experienced error: dial tcp [2a02:4780:1:1::1:9b66]:443: connect: connection refused
A test authorization for www.emplacaweb.com.br to the Let's Encrypt staging service has revealed issues that may prevent any certificate for this domain being issued.
Fetching https://emplacaweb.com.br/.well-known/acme-challenge/xNAVWspWjCry8JMtUAXG6yVAncwzuxLTOs7oy0VRTMY: Connection refused

Submitted Jan 28 14:15:19 2021. Sat in queue for 2ms. Completed in 6s. Show verbose information.