webcam.mba.ac.uk has an A (IPv4) record (192.171.193.68) 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://192.171.163.3/.well-known/acme-challenge/letsdebug-test": No AAAA or A records were found for 192.171.163.3
Trace:
@0ms: Making a request to http://webcam.mba.ac.uk/.well-known/acme-challenge/letsdebug-test (using initial IP 192.171.193.68)
@0ms: Dialing 192.171.193.68
@165ms: Server response: HTTP 302 Found
@165ms: Received redirect to https://192.171.163.3/.well-known/acme-challenge/letsdebug-test
@269ms: Experienced error: No AAAA or A records were found for 192.171.163.3
A test authorization for webcam.mba.ac.uk to the Let's Encrypt staging service has revealed issues that may prevent any certificate for this domain being issued.
192.171.193.68: Fetching https://192.171.163.3/.well-known/acme-challenge/8QyVMiCCJLkNHdJmzoWTNASTtk5Vr91dzD3yXwDOY8k: Invalid host in redirect target "192.171.163.3". Only domain names are supported, not IP addresses