dell-elo.com has an A (IPv4) record (40.74.161.35) 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.
A timeout was experienced while communicating with dell-elo.com/40.74.161.35: Get "http://dell-elo.com/.well-known/acme-challenge/letsdebug-test": context deadline exceeded
Trace:
@0ms: Making a request to http://dell-elo.com/.well-known/acme-challenge/letsdebug-test (using initial IP 40.74.161.35)
@0ms: Dialing 40.74.161.35
@10000ms: Experienced error: context deadline exceeded
A test authorization for dell-elo.com to the Let's Encrypt staging service has revealed issues that may prevent any certificate for this domain being issued.
40.74.161.35: Fetching http://dell-elo.com/.well-known/acme-challenge/r3Y0KLSx5e2c3-57hznmf_XvDVPoa8KEsCWAWXjHSeQ: Timeout during connect (likely firewall problem)