SERVFAIL looking up TXT on subdomain (namecheap DNS)

I’m trying to set up a server and request a cert, but no matter what I try, with either staging or not, letsencrypt keeps saying it can’t resolve the domain…

  "type": "dns-01",
  "status": "invalid",
  "error": {
    "type": "urn:acme:error:connection",
    "detail": "DNS problem: SERVFAIL looking up TXT for",
    "status": 400

I think I’ve figured this out (with the help of StackOverflow) – it appears that the thing that’s failing was not but clearly if that’s the case, the challenge messages and error messages need to be corrected?

For what FQDNs did you try to get a certificate? It’s quite unlikely (but not impossible of course ;)) that the error is incorrect.

The domain I was trying to get the cert for is:

I did get it to go through (at least on the staging environment) after adding the TXT entry on

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