# Certbot issue on Ubuntu 20.04

**URL:** <https://community.letsencrypt.org/t/certbot-issue-on-ubuntu-20-04/120936>\
**Category:** Help\
**Created:** [April 27, 2020, 7:51pm UTC](https://community.letsencrypt.org/t/certbot-issue-on-ubuntu-20-04/120936 "2020-04-27T19:51:55Z")\
**Posts on this page:** 6\
**Page:** 1

<div class="post-metadata">

**Author:** ![zchrykng](https://sea3.discourse-cdn.com/letsencrypt/user_avatar/community.letsencrypt.org/zchrykng/32/39235_2.png) [@zchrykng](https://community.letsencrypt.org/u/zchrykng)\
**Post date:** [April 27, 2020, 7:51pm UTC](https://community.letsencrypt.org/t/certbot-issue-on-ubuntu-20-04/120936/1 "2020-04-27T19:51:55Z")

</div>

My domain is: `casts.king.fyi`

I ran this command: `certbot --nginx -d casts.king.fyi`

It produced this output:

```auto
root@alpha:/var/log/letsencrypt# certbot --nginx -d casts.king.fyi
Saving debug log to /var/log/letsencrypt/letsencrypt.log
Plugins selected: Authenticator nginx, Installer nginx
Obtaining a new certificate
Performing the following challenges:
An unexpected error occurred:
AttributeError: module 'acme.challenges' has no attribute 'TLSSNI01'
Please see the logfiles in /var/log/letsencrypt for more details.

```

My web server is (include version): `nginx/focal,now 1.17.10-0ubuntu1`

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

```auto
NAME="Ubuntu"
VERSION="20.04 LTS (Focal Fossa)"

```

My hosting provider, if applicable, is: N/A

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): No

The version of my client is (e.g. output of `certbot --version` or `certbot-auto --version` if you’re using Certbot): `certbot 0.40.0`

---

<div class="post-metadata">

**Author:** ![Osiris](https://avatars.discourse-cdn.com/v4/letter/o/839c29/32.png) [@Osiris](https://community.letsencrypt.org/u/Osiris)\
**Post date:** [April 27, 2020, 8:04pm UTC](https://community.letsencrypt.org/t/certbot-issue-on-ubuntu-20-04/120936/2 "2020-04-27T20:04:15Z")

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> [@zchrykng](#):
>
> The version of my client is (e.g. output of `certbot --version` or `certbot-auto --version` if you’re using Certbot): `certbot 0.40.0`

What's the version of the `python3-certbot-nginx` package?

---

<div class="post-metadata">

**Author:** ![zchrykng](https://sea3.discourse-cdn.com/letsencrypt/user_avatar/community.letsencrypt.org/zchrykng/32/39235_2.png) [@zchrykng](https://community.letsencrypt.org/u/zchrykng)\
**Post date:** [April 27, 2020, 8:05pm UTC](https://community.letsencrypt.org/t/certbot-issue-on-ubuntu-20-04/120936/3 "2020-04-27T20:05:49Z")

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`python3-certbot-nginx/focal,now 0.39.0-1`

Not seeing any available updates in apt.

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<div class="post-metadata">

**Author:** ![Osiris](https://avatars.discourse-cdn.com/v4/letter/o/839c29/32.png) [@Osiris](https://community.letsencrypt.org/u/Osiris)\
**Post date:** [April 27, 2020, 8:07pm UTC](https://community.letsencrypt.org/t/certbot-issue-on-ubuntu-20-04/120936/4 "2020-04-27T20:07:38Z")

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No, that’s the latest version indeed. And the package `python3-acme`? And the contents of `/var/log/letsencrypt` could be helpful too.

---

<div class="post-metadata">

**Author:** ![zchrykng](https://sea3.discourse-cdn.com/letsencrypt/user_avatar/community.letsencrypt.org/zchrykng/32/39235_2.png) [@zchrykng](https://community.letsencrypt.org/u/zchrykng)\
**Post date:** [April 27, 2020, 8:09pm UTC](https://community.letsencrypt.org/t/certbot-issue-on-ubuntu-20-04/120936/5 "2020-04-27T20:09:25Z")

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Hmm, the workaround [here](https://community.letsencrypt.org/t/ubuntu-20-04-any-tips-attributeerror-module-acme-challenges-has-no-attribute-tlssni01/115831/13) worked for me. Should hold me over until the package is updated.

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<div class="post-metadata">

**Author:** ![system](https://global.discourse-cdn.com/letsencrypt/original/3X/c/a/ca6c06ea1ea201324bba7048c6841ce60236468d.png) [@system](https://community.letsencrypt.org/u/system)\
**Post date:** [May 27, 2020, 8:09pm UTC](https://community.letsencrypt.org/t/certbot-issue-on-ubuntu-20-04/120936/6 "2020-05-27T20:09:29Z")

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