# Certbot Renew failure

**URL:** <https://community.letsencrypt.org/t/certbot-renew-failure/186108>\
**Category:** Help\
**Created:** [October 14, 2022, 2:22pm UTC](https://community.letsencrypt.org/t/certbot-renew-failure/186108 "2022-10-14T14:22:43Z")\
**Posts on this page:** 1\
**Showing post:** 15

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**Author:** ![devahaminapurnama](https://sea3.discourse-cdn.com/letsencrypt/user_avatar/community.letsencrypt.org/devahaminapurnama/32/63133_2.png) [@devahaminapurnama](https://community.letsencrypt.org/u/devahaminapurnama)\
**Post date:** [October 21, 2022, 3:34pm UTC](https://community.letsencrypt.org/t/certbot-renew-failure/186108/15 "2022-10-21T15:34:25Z")

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last week, i have solved with this case [Plesk SSL Let's Encrypt Error - #10 by devahaminapurnama](https://community.letsencrypt.org/t/plesk-ssl-lets-encrypt-error/185861/10)

now, i am try to issue again with different server and domain, then trouble again why Let's Encrypt looking to IPv6, i am not use any IPv6 on my server only IPv4

Could not issue an SSL/TLS certificate for **[thkforum2022.com](http://thkforum2022.com)**  
Details

Could not issue a Let's Encrypt SSL/TLS certificate for **[thkforum2022.com](http://thkforum2022.com)**. Authorization for the domain failed.

Details

Invalid response from [https://acme-v02.api.letsencrypt.org/acme/authz-v3/167106839976](https://acme-v02.api.letsencrypt.org/acme/authz-v3/167106839976).

Details:

Type: urn:ietf:params:acme:error:dns

Status: 400

Detail: DNS problem: SERVFAIL looking up A for [thkforum2022.com](http://thkforum2022.com) - the domain's nameservers may be malfunctioning; DNS problem: query timed out looking up AAAA for [thkforum2022.com](http://thkforum2022.com)

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_[View the full topic](https://community.letsencrypt.org/t/certbot-renew-failure/186108)._