Have added mapping for my domain and add staging based TLS entry for LE but getting below error. My A record for domain is pointing to Caddy server.
I can see in logs following error:
2020/01/11 17:35:05 [ERROR][zenssl.co.in] failed to obtain certificate: acme: Error → One or more domains had a problem:
[zenssl.co.in] acme: error: 400 :: urn:ietf:params:acme:error:dns :: DNS problem: NXDOMAIN looking up A for , url: (attempt 2/2; challenge=tls-alpn-01)
2020/01/11 17:35:06 [ERROR] zenssl.co.in: obtaining certificate: failed to obtain certificate: acme: Error → One or more domains had a problem: