# Failed authorization procedure

**URL:** <https://community.letsencrypt.org/t/failed-authorization-procedure/68629>\
**Category:** Server\
**Created:** [August 6, 2018, 10:12am UTC](https://community.letsencrypt.org/t/failed-authorization-procedure/68629 "2018-08-06T10:12:29Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![ahmed.aly4](https://avatars.discourse-cdn.com/v4/letter/a/47e85d/32.png) [@ahmed.aly4](https://community.letsencrypt.org/u/ahmed.aly4)\
**Post date:** [August 6, 2018, 10:12am UTC](https://community.letsencrypt.org/t/failed-authorization-procedure/68629/1 "2018-08-06T10:12:30Z")

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dear all  
i have rocket chat srv i install nginx to apply https  
and certbot too  
when i run  
sudo certbot --nginx -d [chat.algorithmz.net](http://chat.algorithmz.net) -d [www.chat.algorithmz.net](http://www.chat.algorithmz.net)  
i got this

Saving debug log to /var/log/letsencrypt/letsencrypt.log  
Plugins selected: Authenticator nginx, Installer nginx  
Starting new HTTPS connection (1): [acme-v02.api.letsencrypt.org](http://acme-v02.api.letsencrypt.org)  
Obtaining a new certificate  
Performing the following challenges:  
http-01 challenge for [chat.algorithmz.net](http://chat.algorithmz.net)  
http-01 challenge for [www.chat.algorithmz.net](http://www.chat.algorithmz.net)  
Waiting for verification…  
Cleaning up challenges  
Failed authorization procedure. [chat.algorithmz.net](http://chat.algorithmz.net) (http-01): urn:ietf:params:acme:error:unauthorized :: The client lacks sufficient authorization :: Invalid response from [http://chat.algorithmz.net/.well-known/acme-challenge/oYbxdVFGT5jWV9wW97q8AZMdFvhr0JQl\_\_RG7E5M3B4:](http://chat.algorithmz.net/.well-known/acme-challenge/oYbxdVFGT5jWV9wW97q8AZMdFvhr0JQl__RG7E5M3B4:) "\<?xml version="1.0" encoding="UTF-8"?\>

 \<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1" To fix these errors, please make sure that your domain name was entered correctly and the DNS A/AAAA record(s) for that domain contain(s) the right IP address. ....................

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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:** [September 5, 2018, 10:12am UTC](https://community.letsencrypt.org/t/failed-authorization-procedure/68629/2 "2018-09-05T10:12:36Z")

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