Create new certificate retrun error 400

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My domain is:

I ran this command:

It produced this output:
<br><br>HTTP/1.1 400 Bad Request<br>Server: nginx<br>Date: Thu, 04 Mar 2021 04:35:47 GMT<br>Content-Type: application/problem+json<br>Content-Length: 144<br>Connection: keep-alive<br>Boulder-Requester: 43683669<br>Cache-Control: public, max-age=0, no-cache<br>Link: <>;rel="index"<br>Replay-Nonce: 0003Z1mtbvH7Vlx2wYdTwkmk2LcdCMvqpLfCE0VPqxd5KrI<br><br>{<br> "type": "urn:ietf:params:acme:error:malformed",<br> "detail": "Unable to update challenge :: authorization must be pending",<br> "status": 400<br>}
My web server is (include version):

The operating system my web server runs on is (include version): Centos7

My hosting provider, if applicable, is:

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):

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

Hi @mihakot,

Is it possible that your IPv6 and IPv4 addresses are not both pointing to the same server instance?

1 Like

But I donthave ipv6

@ 300 IN SOA 1614607063 300 600 86400 300
@ 600 IN A
@ 300 IN MX 10
@ 300 IN MX 20
@ 300 IN NS
@ 300 IN NS
@ 300 IN NS
@ 300 IN NS
@ 300 IN NS
@ 300 IN NS
@ 300 IN TXT "v=spf1"
www 600 IN A
autoconfig 300 IN CNAME
autodiscover 300 IN CNAME

чт, 4 мар. 2021 г., 8:24 AM Seth Schoen via Let's Encrypt Community Support <>:

I found ipv6 record. On old dns . Owner not changed dns, just add ipv4 address.

чт, 4 мар. 2021 г., 8:46 AM MihaKot <>:

1 Like

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