Four subdomains - one fail

I have a domain with four subdomains. I use letsencrypt every 3 months to automatically renew the certificates. This time however, one of the four subdomains (“”) is causing errors. The other three have renewed without any problem.

The four domains are:

Only ‘support’ is giving me any trouble.

I have manually checked the .conf files and checked the file permissions for all of the subdomains, and cannot find any difference. I also used nslookup to check that the name resolves to the correct IP address.

My domain is:

I ran this command:
letsencrypt-auto --staging
and / or

It produced this output:
Plugins selected: Authenticator apache, Installer apache
Which names would you like to activate HTTPS for?


Select the appropriate numbers separated by commas and/or spaces, or leave input
blank to select all options shown (Enter ‘c’ to cancel): 3
Obtaining a new certificate
Performing the following challenges:
http-01 challenge for
Waiting for verification…
Cleaning up challenges

Failed authorization procedure. (http-01): urn:ietf:params:acme:error:unauthorized :: The client lacks sufficient authorization :: Invalid response from “<!DOCTYPE HTML PUBLIC “-//IETF//DTD HTML 2.0//EN”>\n<html><head>\n<title>404 Not Found</title>\n</head><body>\n<h1>Not Found</h1>\n<p”


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.

My web server is (include version):
Apache/2.4.18 (Ubuntu)

The operating system my web server runs on is (include version):
Linux IS-28868 4.4.0-64-generic #85-Ubuntu SMP Mon Feb 20 11:50:30 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux

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):

Any ideas what to check next?

What’s this show?

apachectl -t -D DUMP_VHOSTS
kenny@IS-28868:~$ apachectl -t -D DUMP_VHOSTS
AH00526: Syntax error on line 30 of /etc/apache2/sites-enabled/000-default-le-ssl.conf:
SSLCertificateFile: file '/etc/letsencrypt/live/' does not exist or is empty
Action '-t -D DUMP_VHOSTS' failed.
The Apache error log may have more information.

You may want to fix that issue with the VirtualHost first, and then run the command again.

Seems like you may have deleted a certificate you were using.

Thanks - I’ll do that and see how I get on.

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