# Authenicator Digital Ocean failing

**URL:** <https://community.letsencrypt.org/t/authenicator-digital-ocean-failing/59626>\
**Category:** Server\
**Created:** [April 16, 2018, 2:07pm UTC](https://community.letsencrypt.org/t/authenicator-digital-ocean-failing/59626 "2018-04-16T14:07:57Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![LinkOrchard](https://sea3.discourse-cdn.com/letsencrypt/user_avatar/community.letsencrypt.org/linkorchard/32/16139_2.png) [@LinkOrchard](https://community.letsencrypt.org/u/LinkOrchard)\
**Post date:** [April 16, 2018, 2:07pm UTC](https://community.letsencrypt.org/t/authenicator-digital-ocean-failing/59626/1 "2018-04-16T14:07:57Z")

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Hi guys, thanks for reading.

I am getting the following error on Ubuntu 16 when trying to install LetsEncrypt:

“Client with the currently selected authenticator does not support any combination of challenges that will satisfy the CA.”

We have a lot of domains in this account already running SSL with no problems?

Stumped here!

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**Author:** ![alento](https://avatars.discourse-cdn.com/v4/letter/a/5fc32e/32.png) [@alento](https://community.letsencrypt.org/u/alento)\
**Post date:** [April 16, 2018, 2:21pm UTC](https://community.letsencrypt.org/t/authenicator-digital-ocean-failing/59626/2 "2018-04-16T14:21:55Z")

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You have provided no information which anyone can use in an attempt to help you.

We are equally stumped!

You should have started a post in the help category and filled out the following form:

Please fill out the fields below so we can help you better. Note: you must provide your domain name to get help. Domain names for issued certificates are all made public in Certificate Transparency logs (e.g. [https://crt.sh/?q=example.com](https://crt.sh/?q=example.com)), so withholding your domain name here does not increase secrecy, but only makes it harder for us to provide help.

My domain is:

I ran this command:

It produced this output:

My web server is (include version):

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

My hosting provider, if applicable, is:

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

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

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**Author:** ![LinkOrchard](https://sea3.discourse-cdn.com/letsencrypt/user_avatar/community.letsencrypt.org/linkorchard/32/16139_2.png) [@LinkOrchard](https://community.letsencrypt.org/u/LinkOrchard)\
**Post date:** [April 16, 2018, 2:56pm UTC](https://community.letsencrypt.org/t/authenicator-digital-ocean-failing/59626/3 "2018-04-16T14:56:13Z")

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Hi Alento,

Thanks for getting back and I do apologise for the lack info.

If someone is looking at this, in fact the issue came up before and here is the answer:

> [@Solution: Client with the currently selected authenticator does not support any combination of challenges that will satisfy the CA](https://community.letsencrypt.org/t/solution-client-with-the-currently-selected-authenticator-does-not-support-any-combination-of-challenges-that-will-satisfy-the-ca/49983):
>
> I…

By running this line we succeeded in installing LetsEncrypt:

sudo certbot --authenticator standalone --installer apache -d [thedomain.com](http://thedomain.com) --pre-hook "systemctl stop apache2" --post-hook "systemctl start apache2"

replace "[thedomain.com](http://thedomain.com)" as appropriate.

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**Author:** ![system](https://global.discourse-cdn.com/letsencrypt/original/3X/c/a/ca6c06ea1ea201324bba7048c6841ce60236468d.png) [@system](https://community.letsencrypt.org/u/system)\
**Post date:** [May 16, 2018, 2:56pm UTC](https://community.letsencrypt.org/t/authenicator-digital-ocean-failing/59626/4 "2018-05-16T14:56:27Z")

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Closed on May 16, 2018, 2:56pm UTC

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