Could not issue SSL/TLS certificate for

My domain is:

I ran this command: I try to request a certifcate via Plesk (Domain already created)

It produced this output:

Could not issue an SSL/TLS certificate for
Could not issue a Let’s Encrypt SSL/TLS certificate for Authorization for the domain failed.
Invalid response from


Type: urn:ietf:params:acme:error:unauthorized

Status: 403

Detail: No TXT record found at

My web server is (include version): Apache

The operating system my web server runs on is (include version): Cent OS 7

My hosting provider, if applicable, is: IONOS.DE

I can login to a root shell on my machine (yes or no, or I don’t know): yes

I’m using a control panel to manage my site (no, or provide the name and version of the control panel): PLESK

The version of my client is (e.g. output of certbot --version or certbot-auto --version if you’re using Certbot): ?

If i Register a new Domain, everything is fine (i already get certificates at creating a Domain in Plesk).

But if i request a certificate after creating a Domain, i get this error above…

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Hi @cbastian

there is no TXT record -

Ok, may be deleted.

But does your Plesk connect the correct name server? is one of your name servers.

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I checked the DNS-entries in Plesk and they look correct.

I’m wondering why everything is fine with the other Domains!? is another Domain and it works fine, but if i check it with your URL, i get also
‘ - missing entry or wrong length’

Confusing is, that it works for new Domains…

For the wbof-domain, after i create a new certificate, i get a screen where plesk says:

Please wait while Plesk finishes adding a DNS record with the following parameters:
Record type: TXT
Domain name: _acme-challenge
Record: xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx

But it never come back… And if i click on Rebload, i get the error above…. :thinking:

Mybe it is a bug in Plesk!? :slight_smile:

These entries

are not good, but not critical.

If there is no TXT entry, the server should send an error 3 - Domainname does not exist. Not an empty value and NOERROR.

So the name server answer isn't really good, but that's not critical to create a Letsencrypt certificate.


looks like a Plesk bug. Perhaps ask in the Plesk forum or check, if there is an update.

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Thank you for the help… :slight_smile:
I was able to install the certificate manually.

It Looks like the function in Plesk makes some problems, if you try to install a certificate AFTER the domain is already created…. (Plesk Version 18.0.21 up5)

Kind regards

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