I have installed security advisor, added cp.domain.co.uk to the DNS and its working but I still get this
Error: IMPORTANT NOTES:
- The following errors were reported by the server:
Domain: cp.domain.co.uk
Type: unauthorized
Detail: Invalid response from
http://cp.domain.co.uk/.well-known/acme-challenge/DU9okEpkiFtsBgV1e9GDZ1w3RsFSSgsLD4WyfWVZmyw:
"<HTML>
<HEAD>
<TITLE>404 Not Found</TITLE>
<BASE href="/error_docs/"><!--[if lte IE 6]></BASE><![endif]-->
</HEAD>
<BODY>
<H1>No"
To fix these errors, please make sure that your domain name was
entered correctly and the DNS A record(s) for that domain
contain(s) the right IP address.
Failed authorization procedure. cp.domain.co.uk (http-01): urn:acme:error:unauthorized :: The client lacks sufficient authorization :: Invalid response from http://cp.domain.co.uk/.well-known/acme-challenge/DU9okEpkiFtsBgV1e9GDZ1w3RsFSSgsLD4WyfWVZmyw: "<HTML>
< HEAD>
< TITLE>404 Not Found</TITLE>
< BASE href="/error_docs/"><!--[if lte IE 6]></BASE><![endif]-->
< /HEAD>
< BODY>
< H1>No"
Error: IMPORTANT NOTES:
- The following errors were reported by the server:
Domain: cp.domain.co.uk
Type: unauthorized
Detail: Invalid response from
http://cp.domain.co.uk/.well-known/acme-challenge/DU9okEpkiFtsBgV1e9GDZ1w3RsFSSgsLD4WyfWVZmyw:
"<HTML>
<HEAD>
<TITLE>404 Not Found</TITLE>
<BASE href="/error_docs/"><!--[if lte IE 6]></BASE><![endif]-->
</HEAD>
<BODY>
<H1>No"
To fix these errors, please make sure that your domain name was
entered correctly and the DNS A record(s) for that domain
contain(s) the right IP address.
Failed authorization procedure. cp.domain.co.uk (http-01): urn:acme:error:unauthorized :: The client lacks sufficient authorization :: Invalid response from http://cp.domain.co.uk/.well-known/acme-challenge/DU9okEpkiFtsBgV1e9GDZ1w3RsFSSgsLD4WyfWVZmyw: "<HTML>
< HEAD>
< TITLE>404 Not Found</TITLE>
< BASE href="/error_docs/"><!--[if lte IE 6]></BASE><![endif]-->
< /HEAD>
< BODY>
< H1>No"