Problem with DNS of my Website

Hey Guys,

i become an error when i want to install let’s encrypt on a website.

My domain is:

I ran this command: Install via Plesk

It produced this output:
Fehler: Für konnte kein SSL/TLS-Zertifikat von Let’s Encrypt ausgestellt werden. Fehler bei der Autorisierung der Domain.
Zusätzliche Fehlerinformationen:
Invalid response from
Type: urn:acme:error:dns
Status: 400
Detail: DNS problem: SERVFAIL looking up A for

My web server is: ‪Debian 7.11‬, Plesk Onyx
Version 17.5.3 Update #51

My hosting provider, if applicable, is: Vautron AG

You have DNSSEC enabled at the domain registrar, but your nameservers are not setup to sign your zone.

Disable DNSSEC or re-configure it to work.


Thanks for the answer. Now it works fine.

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