SERVFAIL looking up A error - Lets Encrypt and Cloudflare

Hello guys,

I’m trying to issue a new certificate for vps.tuanle.nl, however lately I’ve switched my nameservers to the Cloudflare nameservers. Normally I use the nameservers of my domain registrar and it worked fine.

Currently, I have “Paused” my Cloudflare settings, but only the DNS configurations are active. Whenever I want to issue my certificate I get this error:

{
“type”: “http-01”,
“status”: “invalid”,
“error”: {
“type”: “urn:acme:error:connection”,
“detail”: “DNS problem: SERVFAIL looking up A for vps.tuanle.nl”,
“status”: 400
},
“uri”: “https://acme-v01.api.letsencrypt.org/acme/challenge/bRPfs-AEKa10n8bXgf5GHdHsWAkzRRnP7aJ5GjBlBNE/3425909190”,
“token”: “uvtg5UqXBD7lGcetz1erXZknEMShgVTThSsBpJahmWg”,
“keyAuthorization”: “uvtg5UqXBD7lGcetz1erXZknEMShgVTThSsBpJahmWg.NnKY5QKccivUfWUkrjytBTqHRbYunadDNo3y0CdTmTc”,
“validationRecord”: [
{
“url”: “http://vps.tuanle.nl/.well-known/acme-challenge/uvtg5UqXBD7lGcetz1erXZknEMShgVTThSsBpJahmWg”,
“hostname”: “vps.tuanle.nl”,
“port”: “80”
}
]
}

I’m using the latest “Let’s Encrypt Windows Simple (LEWS)” version and also tried to issue through https://www.sslforfree.com/, but both gives exactly the same error.

The “A Record” should be set correctly inside Cloudflare’s DNS configuration which you can see here:

Am I missing something?