clientservice.tvb.com.hk has an A (IPv4) record (103.84.222.89) 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://clientservice.tvb.com.hk/.well-known/acme-challenge/letsdebug-test": read tcp 172.104.24.29:47556->103.84.222.89:80: read: connection reset by peer
Trace:
@0ms: Making a request to http://clientservice.tvb.com.hk/.well-known/acme-challenge/letsdebug-test (using initial IP 103.84.222.89)
@0ms: Dialing 103.84.222.89
@489ms: Experienced error: read tcp 172.104.24.29:47556->103.84.222.89:80: read: connection reset by peer
A test authorization for clientservice.tvb.com.hk to the Let's Encrypt staging service has revealed issues that may prevent any certificate for this domain being issued.
103.84.222.89: Fetching http://clientservice.tvb.com.hk/.well-known/acme-challenge/9wlCZq0ETYKvqIV1jxCH4IT3i_oDlZ4k8qJMYw69cok: Connection reset by peer