A test authorization for uplesk.citrahost.com to the Let's Encrypt staging service has revealed issues that may prevent any certificate for this domain being issued.
103.123.16.140: Fetching http://uplesk.citrahost.com/.well-known/acme-challenge/3fhNVUk7WhCl84Nm_iE71et94_C6gJxqTaPZRDYmKz4: Timeout during connect (likely firewall problem)