dna.engr.latech.edu has an A (IPv4) record (220.127.116.11) 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 "http://dna.engr.latech.edu/.well-known/acme-challenge/letsdebug-test": read tcp 18.104.22.168:46976->22.214.171.124:80: read: connection reset by peer
@0ms: Making a request to http://dna.engr.latech.edu/.well-known/acme-challenge/letsdebug-test (using initial IP 126.96.36.199)
@0ms: Dialing 188.8.131.52
@74ms: Experienced error: read tcp 184.108.40.206:46976->220.127.116.11:80: read: connection reset by peer
A test authorization for dna.engr.latech.edu to the Let's Encrypt staging service has revealed issues that may prevent any certificate for this domain being issued.
18.104.22.168: Fetching http://dna.engr.latech.edu/.well-known/acme-challenge/5blOFBZVVvXjjyx9j22C1-0JiX0Y0eQvn5pa-5xENwk: Connection reset by peer